.gitlab-ci.yml

-image: kroniak/ssh-client
+# image: kroniak/ssh-client
 
 stages:
+  - generate
+  - build
   - deploy
 
-home:
+variables:
+  CI_REGISTRY_IMAGE: ${CI_REGISTRY}/${CI_PROJECT_NAME}
+  KUBECONFIG_VAR_NAME: KUBECONFIG
+
+# home:
+#   stage: deploy
+#   before_script:
+#     - eval $(ssh-agent -s)
+#     - echo "$SSH" | tr -d '\r' | ssh-add -
+#     - mkdir -p ~/.ssh/socket
+#     - chmod 700 ~/.ssh
+#     - cp .magic_ssh_config ~/.ssh/config
+#   script:
+#     # AFS magic incoming
+#     - ssh mikewashere@centaur.sch.bme.hu cp /afs/sch.bme.hu/home/mikewashere/.system/mikewashere.keytab /tmp/mikewashere.keytab
+#     - ssh mikewashere@centaur.sch.bme.hu kinit -k -t /tmp/mikewashere.keytab mikewashere
+#     - ssh mikewashere@centaur.sch.bme.hu rm /tmp/mikewashere.keytab
+#     - ssh mikewashere@centaur.sch.bme.hu aklog sch.bme.hu -k SCH.BME.HU
+#     - ssh mikewashere@centaur.sch.bme.hu mkdir -p /home/mikewashere/public_html/linux
+#     # actual work
+#     - scp -r $PWD/* mikewashere@centaur.sch.bme.hu:/home/mikewashere/public_html/linux/
+#     - ssh mikewashere@centaur.sch.bme.hu env sh -c 'echo lolwut; cd public_html/linux; bash cirun.sh'
+#   only:
+#     refs:
+#       - master
+
+gen_pres:
+  stage: generate
+  image: 
+    name: marpteam/marp-cli
+    entrypoint: [""]
+  script:
+    - alias marp="node /home/marp/.cli/marp-cli.js"
+    - cd eloadas
+    - marp -o index.html presentation.md
+  artifacts:
+    paths:
+      - eloadas/index.html    
+
+container:
+  stage: build
+  image:
+    name: gcr.io/kaniko-project/executor:debug
+    entrypoint: [""]
+  before_script:
+    - mkdir -p /kaniko/.docker
+    - echo "{\"auths\":{\"$CI_REGISTRY\":{\"auth\":\"$(echo -n ${CI_REGISTRY_USER}:${CI_REGISTRY_PASSWORD} | base64)\"}}}" > /kaniko/.docker/config.json
+  script:
+    - |
+      /kaniko/executor --context ${CI_PROJECT_DIR} \
+      --dockerfile ${CI_PROJECT_DIR}/Dockerfile \
+      --destination ${CI_REGISTRY_IMAGE}:latest
+  only:
+    - master
+  except:
+    - tags
+
+kubernetes:
   stage: deploy
+  image: 
+    name: harbor.sch.bme.hu/kszk/kube-tools:latest
+    entrypoint: [""]
   before_script:
-    - 'which ssh-agent || ( apt-get update -y && apt-get install openssh-client -y )'
-    - eval $(ssh-agent -s)
-    - echo "$SSH" | tr -d '\r' | ssh-add -
-    - mkdir -p ~/.ssh/socket
-    - chmod 700 ~/.ssh
-    - cp .magic_ssh_config ~/.ssh/config
+    - chmod 600 ${!KUBECONFIG_VAR_NAME}
+    - export KUBECONFIG=${!KUBECONFIG_VAR_NAME}
   script:
-    # AFS magic incoming
-    - ssh mikewashere@centaur.sch.bme.hu cp /afs/sch.bme.hu/home/mikewashere/.system/mikewashere.keytab /tmp/
-    - ssh mikewashere@centaur.sch.bme.hu kinit -k -t /tmp/mikewashere.keytab mikewashere
-    - ssh mikewashere@centaur.sch.bme.hu rm /tmp/mikewashere.keytab
-    - ssh mikewashere@centaur.sch.bme.hu aklog sch.bme.hu -k SCH.BME.HU
-    - ssh mikewashere@centaur.sch.bme.hu mkdir -p ~/public_html/linux
-    - ls ~/.ssh/socket
-    # actual work
-    - scp -R . mikewashere@centaur.sch.bme.hu:~/public_html/linux/.
+    - kubectl rollout restart deployment linux-presentation
   only:
-    refs:
-      - master
\ No newline at end of file
+    - master
+  except:
+    - tags

.magic_ssh_config

@@ -2,4 +2,7 @@ Host centaur.sch.bme.hu
     StrictHostKeyChecking no
     ControlMaster auto
     ControlPersist yes
-    ControlPath ~/.ssh/socket/%r@%h:%p
\ No newline at end of file
+    ControlPath ~/.ssh/socket/%r@%h:%p
+    KexAlgorithms +diffie-hellman-group1-sha1
+    Ciphers +3des-cbc,aes128-cbc,aes192-cbc,aes256-cbc,aes128-ctr,aes192-ctr,aes256-ctr
+    HostKeyAlgorithms +ssh-rsa

Dockerfile

+FROM nginx:1.21.6
+
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+COPY . /usr/share/nginx/html

LICENSE

+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    Linux presentation
+    Copyright (C) 2021  Miklós Tóth
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.

README.md

-# Hello world
\ No newline at end of file
+# Üdv a Linuxos előadás segédletében
+
+<p id="meme"></p>
+
+## Kedvcsináló
+
+<script>
+  if (
+    navigator.platform.indexOf("Linux") !== -1 &&
+    !(navigator.userAgent.indexOf("Android") !== -1)
+  ) {
+    document.getElementById('meme').innerText = "And oh, btw, hello fellow Linux user!";
+  }
+</script>
+
+*Miért is jó nekem, ha tudok Linuxul?*  
+- A világ legelterjedtebb\* operációs rendszerét tudni fogod használni.   
+    - Az interneten lévő szerverek [túlnyomó többsége](https://en.wikipedia.org/wiki/Usage_share_of_operating_systems#Public_servers_on_the_Internet) Linuxot használ
+    - Az Android is Linux alapú, így a telefonok [>70%-án](https://en.wikipedia.org/wiki/Usage_share_of_operating_systems#Mobile_devices) Linux fut
+    - A [top 500](https://en.wikipedia.org/wiki/Usage_share_of_operating_systems#Supercomputers) szuperszámítógép mind Linuxot futtat
+    - Mindenféle beágyazott cuccban megtalálható a Linux (autók, random gépek, stb)
+- Sok itt megtanult tudást más operációs rendszereken is tudod hasznosítani
+    - A legtöbb nem Windows alapú OS UNIX-szerű<sup>(erről később lesz szó)</sup>, csakúgy mint a Linux,
+      így az előadásaink nagy része ugyanígy vonatkozik macOS-re és BSD-kre is  
+- A KSZK-s szolgáltatások többsége is Linuxon fut,
+  így szükséged lesz egy kis Linux tudásra akkor is, ha a DevTeam-ben
+  vagy HaT-ban szeretnél ügyeskedni, nem beszélve a SysAdmin-ról, NETeam-ről vagy SecurITeam-ről 
+
+*OK, meggyőztél. Miről is lesz szó?*
+- UNIX-os dolgokról
+- Terminálról, shellről
+- A Linux alapvető felépítéséről
+- Pár fontosabb parancsról
+- Egy (web)szerver üzemeltetéséhez szükséges tudásról
+
+## Jegyzet
+
+- [Linux alapok](linux%20alapok.md)
+- [Szerver kezelés](szerver%20kezelés.md)
+

ascii-art.txt

+
+     
+     
+                                    ,,╓╖æææφφæææ╖╖,,
+                              ,φΦ▓╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫▓Φæ┐
+                          ╓Φ▓╫╫╫╫╫╫╫╫▓╣╝╝╝╜╜╜╜╜╝╝╣▓╫╫╫╫╫╫╫╫╫Φ╖
+                      ,╖▓╫╫╫╫╫╫▌╜"`                  `"╜╣╫╫╫╫╫╫▓╗,
+                    ╓╣╫╫╫╫╫▌╜`                            `╙╣╫╫╫╫╫▓╖
+                  ╔▓╫╫╫╫▌┘                                    ╙╣╫╫╫╫╫╗
+                ╓▓╫╫╫╫Å`                                        `╝╫╫╫╫╫φ
+              ,╣╫╫╫╫▀                                              ╝╫╫╫╫▓
+             ╓╫╫╫╫▓^                                                `╣╫╫╫╫w
+            ╓╫╫╫╫▌                                                    ║╫╫╫╫N
+           ╓╫╫╫╫▌           ╓╫╫▌                             Φ▓Φ       ║╫╫╫╫φ
+          .╫╫╫╫▌            ╫╫▓                             ╣╫╫M        ║╫╫╫╫∩
+          ╣╫╫╫╫            ╢╫╫                             ╓╫╫▌          ╫╫╫╫▓
+         .╫╫╫╫▀           ╓╫╫╛                            .╫╫▓           ║╫╫╫╫L
+         ║╫╫╫╫            ▓╫▌        ║╫╫╫@          ,,,   ╣╫╫             ╫╫╫╫▌
+         ╣╫╫╫╫           ╢╫╫   ,╖æ  .╫╫╫▌    ,╗╣▓╫╫╫╫╫╫╫╡║╫╫Ñ   ,ææ       ╫╫╫╫╫
+         ╣╫╫╫╫          ┌╫╫Γ,æ▓╫╝   ╣╫╫▓     '╝╝╝╜╢╫╫╫╫M,╫╫╫ ,φ▓╫▓┘       ╫╫╫╫╫
+         ║╫╫╫╫          ▓╫╫▓╫╣╜    ╓╫╫╫╡        ╓╣╫╫╫▀  ▓╫╫▌╣╫╫▓┘         ╫╫╫╫▌
+         ╘╫╫╫╫L        ║╫╫╫╫╜     ,╫╫╫╫▓      ╓▓╫╫╫Å   ║╫╫╫╫╫▌`          ╣╫╫╫╫
+          ╫╫╫╫▓       .╫╫╫╫╫φ    ,▓╫▀╫╫╫φ   ╗▓╫╫╫╝    ┌╫╫╫╫╫╫┐         ╓▓╫╫╫╫┘
+          ╘╫╫╫╫φ      ╣╫╫╛╚╫╫W,╓╬╫╫▓ ║╫╫╫ ╓▓╫╫╫▓╖╗╖┐  ▓╫╫▌║╫╫╫µ ,,,╖╗╣╫╫╫╫╫▌
+           ╢╫╫╫╫┐    ┌╫╫M   ╚▓╫╫╫▓╫╫╫╣╫╫▓ ╫╫╫╫╫╫╫╫╫▓┘║╫╫▌  ╣╫╫╫╫╫╫╫╫╫╫╫╫▓╜
+            ╣╫╫╫╫┐   '╝`           ╙╝╣╣╝  `╙╜╙"^`    ╣╫▌    ╙╣╫╫╫╫▓▀╝╜`
+             ╣╫╫╫╫W
+              ╚╫╫╫╫▓,
+               `╣╫╫╫╫Φ,
+                 ╙▓╫╫╫╫▓w                                      ┌╣▓╖
+                   ╙╣╫╫╫╫╫Φ,                                ,#▓╫╫╫╫▓
+                     `╝╫╫╫╫╫╫▓╗,                        ,╖╣╫╫╫╫╫╫Å`
+                        `╝▓╫╫╫╫╫╫╫▓φ╗╖,,        ,,╓╖φ╣╫╫╫╫╫╫╫▓╝`
+                            "╜╣╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫▓╝"
+                                 `╙╜╝╣▓╫╫╫╫╫╫╫╫╫╫▓╣╝╜╙`
+     
+     
+    
+

cirun.sh

+#!/bin/bash
+
+if [ -n "$SSH_CLIENT" ] || [ -n "$SSH_TTY" ]; then
+  #echo "Not yet 😉" > "második videó.md"
+  echo "Lorem Ipsum is simply dummy text of the printing and typesetting industry."
+fi

eloadas.html

+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <meta name="generator" content="pandoc">
+  <meta name="author" content="Tóth Miklós">
+  <meta name="dcterms.date" content="2021-03-21">
+  <title>Linux előadás</title>
+  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui">
+  <link rel="stylesheet" href="https://unpkg.com/reveal.js@^4//dist/reset.css">
+  <link rel="stylesheet" href="https://unpkg.com/reveal.js@^4//dist/reveal.css">
+  <style>
+    code{white-space: pre-wrap;}
+    span.smallcaps{font-variant: small-caps;}
+    span.underline{text-decoration: underline;}
+    div.column{display: inline-block; vertical-align: top; width: 50%;}
+    div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
+    ul.task-list{list-style: none;}
+    .display.math{display: block; text-align: center; margin: 0.5rem auto;}
+  </style>
+  <link rel="stylesheet" href="https://unpkg.com/reveal.js@^4//dist/theme/black.css" id="theme">
+</head>
+<body>
+  <div class="reveal">
+    <div class="slides">
+
+<section id="title-slide">
+  <h1 class="title">Linux előadás</h1>
+  <p class="author">Tóth Miklós</p>
+  <p class="date">March 21, 2021</p>
+</section>
+
+<section id="pár-egyéb-hasznos-parancs" class="slide level1">
+<h1>Pár egyéb hasznos parancs</h1>
+</section>
+<section id="wc" class="slide level1">
+<h1><code>wc</code></h1>
+<ul>
+<li>word counter</li>
+<li>szavak, sorok számolása</li>
+</ul>
+<pre class="shell-session"><code>[mike@thinkyboi ~]$ echo &quot;egy két há&quot; | wc -w
+3
+[mike@thinkyboi ~]$ echo &quot;egy két há&quot; | wc -l
+1
+[mike@thinkyboi ~]$ echo &quot;egy
+két
+há&quot; | wc -l
+3</code></pre>
+</section>
+<section id="tr" class="slide level1">
+<h1><code>tr</code></h1>
+<ul>
+<li>karaktereket cserél ki vagy töröl</li>
+</ul>
+<pre class="shell-session"><code>[mike@thinkyboi ~]$ echo &quot;almafa&quot; | tr &quot;a&quot; &quot;e&quot;
+elmefe
+[mike@thinkyboi ~]$ echo &quot;almafa körtefa eperfa&quot; | tr &quot; &quot; &quot;\n&quot;
+almafa
+körtefa
+eperfa
+[mike@thinkyboi ~]$ echo &quot;almafa&quot; | tr -d &quot;a&quot;
+lmf</code></pre>
+</section>
+<section id="curl" class="slide level1">
+<h1><code>curl</code></h1>
+<ul>
+<li>http shellből</li>
+<li>stdout-ra írja ki, kivéve, ha van <code>-o</code> kapcsoló</li>
+</ul>
+<pre class="shell-session"><code>[mike@thinkyboi ~]$ curl https://home.sch.bme.hu/~mikewashere/linux/eloadas.md | grep stdout
+  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+                                 Dload  Upload   Total   Spent    Left  Speed
+100   777  100   777    0     0  33782      0 --:--:-- --:--:-- --:--:-- 33782
+- stdout-ra írja ki
+[mike@thinkyboi ~]$ curl https://home.sch.bme.hu/~mikewashere/linux/eloadas.md -o eloadas.md
+  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+                                 Dload  Upload   Total   Spent    Left  Speed
+100   777  100   777    0     0  31080      0 --:--:-- --:--:-- --:--:-- 31080
+[mike@thinkyboi ~]$ </code></pre>
+</section>
+<section id="sh-fileok" class="slide level1">
+<h1><code>.sh</code> fileok</h1>
+<ul>
+<li>shell automatizálása</li>
+<li>mintha soronként kiadnánk a parancsokat</li>
+</ul>
+</section>
+<section id="egy-.sh-file" class="slide level1">
+<h1>egy <code>.sh</code> file</h1>
+<pre class="shell-session"><code>[mike@thinkyboi tmp]$ vi test.sh
+[mike@thinkyboi tmp]$ cat test.sh 
+echo &quot;ez simán működik&quot; | cowsay
+curl &quot;https://home.sch.bme.hu/~mikewashere/linux/eloadas.md&quot; | grep &quot;soronként&quot; | cowsay
+
+[mike@thinkyboi tmp]$ bash test.sh 
+ _____________________ 
+&lt; ez simán működik &gt;
+ --------------------- 
+        \   ^__^
+         \  (oo)\_______
+            (__)\       )\/\
+                ||----w |
+                ||     ||
+  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+                                 Dload  Upload   Total   Spent    Left  Speed
+100  1596  100  1596    0     0  69391      0 --:--:-- --:--:-- --:--:-- 69391
+ _________________________________ 
+/ - mintha soronként kiadnánk a \
+\ parancsokat                     /
+ --------------------------------- 
+        \   ^__^
+         \  (oo)\_______
+            (__)\       )\/\
+                ||----w |
+                ||     ||
+[mike@thinkyboi tmp]$ </code></pre>
+</section>
+<section id="shebang" class="slide level1">
+<h1>shebang</h1>
+<ul>
+<li>file futtatásakor a kernel meglesi mi van az elején</li>
+<li>el tudunk indítani scripteket programként</li>
+<li><code>#!&lt;program&gt;</code></li>
+</ul>
+</section>
+<section id="shebang-1" class="slide level1">
+<h1>shebang</h1>
+<pre class="shell-session"><code>[mike@thinkyboi tmp]$ vi test.sh 
+[mike@thinkyboi tmp]$ cat test.sh 
+#!/bin/bash
+echo &quot;ez simán működik&quot; | cowsay
+curl &quot;https://home.sch.bme.hu/~mikewashere/linux/eloadas.md&quot; | grep &quot;soronként&quot; | cowsay
+
+[mike@thinkyboi tmp]$ chmod +x test.sh 
+[mike@thinkyboi tmp]$ ./test.sh 
+ _____________________ 
+&lt; ez simán működik &gt;
+ --------------------- 
+        \   ^__^
+         \  (oo)\_______
+            (__)\       )\/\
+                ||----w |
+                ||     ||
+  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+                                 Dload  Upload   Total   Spent    Left  Speed
+100  1596  100  1596    0     0  11319      0 --:--:-- --:--:-- --:--:-- 11319
+ _________________________________ 
+/ - mintha soronként kiadnánk a \
+\ parancsokat                     /
+ --------------------------------- 
+        \   ^__^
+         \  (oo)\_______
+            (__)\       )\/\
+                ||----w |
+                ||     ||
+[mike@thinkyboi tmp]$ </code></pre>
+</section>
+<section id="tűzfal" class="slide level1">
+<h1>tűzfal</h1>
+<ul>
+<li>a kernel belsejében -&gt; gyors, de low-level</li>
+<li>iptables</li>
+<li>kényelmesebb egy tűzfal-kezelő</li>
+</ul>
+</section>
+<section id="ufw" class="slide level1">
+<h1>UFW</h1>
+<ul>
+<li>uncomplicated firewall</li>
+<li>egyszerű</li>
+</ul>
+<pre class="shell-session"><code>[mike@thinkyboi tmp]$ sudo ufw allow 80
+Rules updated
+Rules updated (v6)
+[mike@thinkyboi tmp]$ sudo ufw allow https
+Rules updated
+Rules updated (v6)
+[mike@thinkyboi tmp]$ sudo ufw enable</code></pre>
+</section>
+<section id="ssh-kulcsok" class="slide level1">
+<h1>SSH kulcsok</h1>
+<ul>
+<li>biztonságosabb, mint egy jelszó</li>
+<li>sok algoritmus, RSA, elliptikus görbék</li>
+<li>publikus-privát</li>
+<li>privát saját gépen, védve</li>
+<li>publikus ott, ahova belépnénk</li>
+<li><code>~/.ssh/authorized_keys</code></li>
+</ul>
+</section>
+<section id="generálás" class="slide level1">
+<h1>Generálás</h1>
+<pre class="shell-session"><code>mike@thinkyboi:~$ ssh-keygen
+Generating public/private rsa key pair.
+Enter file in which to save the key (/home/mike/.ssh/id_rsa): 
+Created directory &#39;/home/mike/.ssh&#39;.
+Enter passphrase (empty for no passphrase): 
+Enter same passphrase again: 
+Your identification has been saved in /home/mike/.ssh/id_rsa
+Your public key has been saved in /home/mike/.ssh/id_rsa.pub
+The key fingerprint is:
+SHA256:tYZX08XEZfJP5j/um2Y9KUgG+jffe82ONwgzkt4p0hc mike@thinkyboi
+The key&#39;s randomart image is:
++---[RSA 3072]----+
+|              .+*|
+|             . =o|
+|          . o . +|
+|         + o . +.|
+|        S *     o|
+|       . = E    .|
+|        + = B .o=|
+|       . = B ooBO|
+|        . + o.*XB|
++----[SHA256]-----+
+mike@thinkyboi:~$ cat .ssh/id_rsa.pub 
+ssh-rsa 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 mike@thinkyboi
+mike@thinkyboi:~$ </code></pre>
+</section>
+<section id="operátor" class="slide level1">
+<h1><code>&gt;&gt;</code> operátor</h1>
+<ul>
+<li><code>&gt;</code> tesója</li>
+<li>filehoz appendál</li>
+</ul>
+<pre class="shell"><code>curl https://git.sch.bme.hu/mikewashere.keys &gt;&gt; ~/.ssh/authorized_keys</code></pre>
+</section>
+<section id="házi-feladatok" class="slide level1">
+<h1>Házi Feladatok</h1>
+</section>
+<section id="alap-házi" class="slide level1">
+<h1>Alap házi</h1>
+<p>Csinálj felhasználót a csapattársaidnak a VM-edre úgy, hogy hozzáférjenek a statikus weboldalak mappájához, ezután próbáljátok ki, hogy valóban hozzáfértek-e és ha igen, rakjatok valami funky html-t a mappába ajándékba a társaitoknak.</p>
+<p>Hint: adduser/useradd, usermod/gpasswd, chmod.</p>
+</section>
+<section id="side-quest" class="slide level1">
+<h1>Side Quest</h1>
+<p>Állíts be kulcsos hitelesítést a képzés VM-eden az SSH kapcsolatodhoz. Ehhez szükséged lesz egy privát és egy publikus kulcsra a kliensgépeden.</p>
+<p>Hint: ssh-keygen.</p>
+</section>
+<section id="expert-sudo" class="slide level1">
+<h1>Expert (sudo)</h1>
+<p>Nyomozz hogyan és miért műküdik a sudo parancs! Ha megtaláltad próbáld meg összefoglalni nekünk néhány mondatban.</p>
+<p>Hint: setuid</p>
+</section>
+<section id="expert-csomag-mágus" class="slide level1">
+<h1>Expert (Csomag mágus)</h1>
+<p>Készíts egy új csomagot (package) egy általad válaszott programból (saját program is lehet), egy általad választott disztribúcióhoz.</p>
+</section>
+<section id="jó-munkát" class="slide level1">
+<h1>Jó munkát!</h1>
+</section>
+    </div>
+  </div>
+
+  <script src="https://unpkg.com/reveal.js@^4//dist/reveal.js"></script>
+
+  // reveal.js plugins
+  <script src="https://unpkg.com/reveal.js@^4//plugin/notes/notes.js"></script>
+  <script src="https://unpkg.com/reveal.js@^4//plugin/search/search.js"></script>
+  <script src="https://unpkg.com/reveal.js@^4//plugin/zoom/zoom.js"></script>
+
+  <script>
+
+      // Full list of configuration options available at:
+      // https://revealjs.com/config/
+      Reveal.initialize({
+      
+        // Push each slide change to the browser history
+        history: true,
+
+        // reveal.js plugins
+        plugins: [
+          RevealNotes,
+          RevealSearch,
+          RevealZoom
+        ]
+      });
+    </script>
+    </body>
+</html>

eloadas.md

+% Linux előadás
+% Tóth Miklós
+% March 21, 2021
+
+# Pár egyéb hasznos parancs
+
+# `wc`
+
+- word counter
+- szavak, sorok számolása
+
+```shell-session
+[mike@thinkyboi ~]$ echo "egy két há" | wc -w
+3
+[mike@thinkyboi ~]$ echo "egy két há" | wc -l
+1
+[mike@thinkyboi ~]$ echo "egy
+két
+há" | wc -l
+3
+```
+
+# `tr`
+
+- karaktereket cserél ki vagy töröl
+
+```shell-session
+[mike@thinkyboi ~]$ echo "almafa" | tr "a" "e"
+elmefe
+[mike@thinkyboi ~]$ echo "almafa körtefa eperfa" | tr " " "\n"
+almafa
+körtefa
+eperfa
+[mike@thinkyboi ~]$ echo "almafa" | tr -d "a"
+lmf
+```
+
+# `curl`
+
+- http shellből
+- stdout-ra írja ki, kivéve, ha van `-o` kapcsoló
+
+```shell-session
+[mike@thinkyboi ~]$ curl https://home.sch.bme.hu/~mikewashere/linux/eloadas.md | grep stdout
+  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+                                 Dload  Upload   Total   Spent    Left  Speed
+100   777  100   777    0     0  33782      0 --:--:-- --:--:-- --:--:-- 33782
+- stdout-ra írja ki
+[mike@thinkyboi ~]$ curl https://home.sch.bme.hu/~mikewashere/linux/eloadas.md -o eloadas.md
+  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+                                 Dload  Upload   Total   Spent    Left  Speed
+100   777  100   777    0     0  31080      0 --:--:-- --:--:-- --:--:-- 31080
+[mike@thinkyboi ~]$ 
+```
+
+# `.sh` fileok
+
+- shell automatizálása
+- mintha soronként kiadnánk a parancsokat
+
+# egy `.sh` file
+
+```shell-session
+[mike@thinkyboi tmp]$ vi test.sh
+[mike@thinkyboi tmp]$ cat test.sh 
+echo "ez simán működik" | cowsay
+curl "https://home.sch.bme.hu/~mikewashere/linux/eloadas.md" | grep "soronként" | cowsay
+
+[mike@thinkyboi tmp]$ bash test.sh 
+ _____________________ 
+< ez simán működik >
+ --------------------- 
+        \   ^__^
+         \  (oo)\_______
+            (__)\       )\/\
+                ||----w |
+                ||     ||
+  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+                                 Dload  Upload   Total   Spent    Left  Speed
+100  1596  100  1596    0     0  69391      0 --:--:-- --:--:-- --:--:-- 69391
+ _________________________________ 
+/ - mintha soronként kiadnánk a \
+\ parancsokat                     /
+ --------------------------------- 
+        \   ^__^
+         \  (oo)\_______
+            (__)\       )\/\
+                ||----w |
+                ||     ||
+[mike@thinkyboi tmp]$ 
+```
+
+# shebang
+
+- file futtatásakor a kernel meglesi mi van az elején
+- el tudunk indítani scripteket programként
+- `#!<program>`
+
+# shebang
+
+```shell-session
+[mike@thinkyboi tmp]$ vi test.sh 
+[mike@thinkyboi tmp]$ cat test.sh 
+#!/bin/bash
+echo "ez simán működik" | cowsay
+curl "https://home.sch.bme.hu/~mikewashere/linux/eloadas.md" | grep "soronként" | cowsay
+
+[mike@thinkyboi tmp]$ chmod +x test.sh 
+[mike@thinkyboi tmp]$ ./test.sh 
+ _____________________ 
+< ez simán működik >
+ --------------------- 
+        \   ^__^
+         \  (oo)\_______
+            (__)\       )\/\
+                ||----w |
+                ||     ||
+  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+                                 Dload  Upload   Total   Spent    Left  Speed
+100  1596  100  1596    0     0  11319      0 --:--:-- --:--:-- --:--:-- 11319
+ _________________________________ 
+/ - mintha soronként kiadnánk a \
+\ parancsokat                     /
+ --------------------------------- 
+        \   ^__^
+         \  (oo)\_______
+            (__)\       )\/\
+                ||----w |
+                ||     ||
+[mike@thinkyboi tmp]$ 
+```
+
+# tűzfal
+
+- a kernel belsejében -> gyors, de low-level
+- iptables
+- kényelmesebb egy tűzfal-kezelő
+
+# UFW
+
+- uncomplicated firewall
+- egyszerű
+
+```shell-session
+[mike@thinkyboi tmp]$ sudo ufw allow 80
+Rules updated
+Rules updated (v6)
+[mike@thinkyboi tmp]$ sudo ufw allow https
+Rules updated
+Rules updated (v6)
+[mike@thinkyboi tmp]$ sudo ufw enable
+```
+
+# SSH kulcsok
+
+- biztonságosabb, mint egy jelszó
+- sok algoritmus, RSA, elliptikus görbék
+- publikus-privát
+- privát saját gépen, védve
+- publikus ott, ahova belépnénk
+- `~/.ssh/authorized_keys`
+
+# Generálás
+
+```shell-session
+mike@thinkyboi:~$ ssh-keygen
+Generating public/private rsa key pair.
+Enter file in which to save the key (/home/mike/.ssh/id_rsa): 
+Created directory '/home/mike/.ssh'.
+Enter passphrase (empty for no passphrase): 
+Enter same passphrase again: 
+Your identification has been saved in /home/mike/.ssh/id_rsa
+Your public key has been saved in /home/mike/.ssh/id_rsa.pub
+The key fingerprint is:
+SHA256:tYZX08XEZfJP5j/um2Y9KUgG+jffe82ONwgzkt4p0hc mike@thinkyboi
+The key's randomart image is:
++---[RSA 3072]----+
+|              .+*|
+|             . =o|
+|          . o . +|
+|         + o . +.|
+|        S *     o|
+|       . = E    .|
+|        + = B .o=|
+|       . = B ooBO|
+|        . + o.*XB|
++----[SHA256]-----+
+mike@thinkyboi:~$ cat .ssh/id_rsa.pub 
+ssh-rsa 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 mike@thinkyboi
+mike@thinkyboi:~$ 
+```
+
+# `>>` operátor
+
+- `>` tesója
+- filehoz appendál
+```shell
+curl https://git.sch.bme.hu/mikewashere.keys >> ~/.ssh/authorized_keys
+```
+
+# Házi Feladatok
+
+# Alap házi
+
+Csinálj felhasználót a csapattársaidnak a VM-edre úgy, hogy
+hozzáférjenek a statikus weboldalak mappájához,
+ezután próbáljátok ki, hogy valóban hozzáfértek-e
+és ha igen, rakjatok valami funky html-t a mappába ajándékba a társaitoknak.
+
+Hint: adduser/useradd, usermod/gpasswd, chmod.
+
+# Side Quest
+
+Állíts be kulcsos hitelesítést a képzés VM-eden az SSH kapcsolatodhoz.
+Ehhez szükséged lesz egy privát és egy publikus kulcsra a kliensgépeden.
+
+Hint: ssh-keygen.
+
+# Expert (sudo)
+
+Nyomozz hogyan és miért műküdik a sudo parancs!
+Ha megtaláltad próbáld meg összefoglalni nekünk néhány mondatban.
+
+Hint: setuid
+
+# Expert (Csomag mágus)
+
+Készíts egy új csomagot (package) egy általad válaszott programból
+(saját program is lehet), egy általad választott disztribúcióhoz.
+
+# Jó munkát!

eloadas/.gitignore

+presentation.html
+index.html

eloadas/presentation.md

+---
+marp: true
+theme: gaia
+class: [lead, invert]
+---
+# KSZKépzés Linux
+Tóth Miklós
+
+---
+<!-- class: [invert] --> 
+
+## Mi is a Linux?
+
+- kernel
+    - de! GNU/Linux már OS
+- disztrók
+- GUI
+- CLI
+
+---
+
+## CLI
+
+*Command Line Interface*
+
+- terminál
+- shell
+    - sh
+    - bash
+    - zsh
+    - fish
+
+---
+
+## Shelles fogalmak
+
+- kapcsolók `rm -rf`
+- redirekció `ls > fajllista.txt`
+- piping `cat alma.txt | grep körte`
+- shell execution `echo a mappa tartalma: $(ls)`
+
+---
+
+## Szövegszerkesztők
+
+- nano
+- vi, vim, nvim
+
+---
+
+## Gyakori parancsok
+
+- ls
+- man
+- cat
+- echo
+- cd
+- mkdir
+- rm
+- rmdir
+- touch
+
+---
+
+## Csomagkezelés
+
+- Mi a csomag?
+- Hogyan telepítünk programokat Linuxon?
+- Miért jó ez?
+- Hogy működik az `apt`?
+
+---
+
+## Fájlkezelés
+
+- `/` jel van `\` helyett
+- nincs `C:\`, hanem `/`-ből indul minden
+- `/etc`, `/dev`, `/home`, `/bin`, `/lib`, `/proc`, stb.
+- `../`, `./`, `~`, `~bela`
+
+---
+
+## Jogosultságok
+
+- `user`, `group`, `others`
+- `rwx` hármasok
+- `setuid`, `setgid`, `sticky bit`
+- `chmod`, `chown`, `chgrp`
+
+---
+
+## UNIX elvek
+
+- KISS
+- Everything is a file
+
+---
+
+## Architektúra
+
+- Bootloader
+- Kernel
+- Init rendszer
+- "Userland"
+
+---
+
+## Felhasználókezelés
+
+- `useradd`, `usermod`, `userdel`
+- (`adduser`, `deluser`)
+- `passwd`
+- `sudo`
+
+---
+
+## Csoportok
+
+- `groups`
+- `groupadd`, `groupdel`
+- `usermod`
+- `gpasswd`
+
+---
+
+## Init rendszer, systemd
+
+- Miért?
+- Mi egy service?
+- systemctl
+- journalctl
+
+---
+
+## Hálózat
+
+- `ip address`, `ip addr add`
+- `ip route`, `ip route add`
+- hálózatkezelők, `NetworkManager`
+
+---
+
+## SSH
+
+- secure remote shell
+- kulcsok
+- sok egyéb okos feature
+
+---
+<!-- class: [lead, invert] --> 
+
+# Kahoot!
+
+---
+
+# Workshop time!
+
+---
+
+<!-- class: [invert] --> 
+
+## 1. feladat
+
+Telepíts fel egy apache2 webszervert és állítsd be, hogy egy mappában lévő szkripteket lefuttasson és kimenetüket leküldje!
+
+---
+
+```sh 
+sudo ln -s /etc/apache2/mods-available/cgi.load /etc/apache2/mods-enabled/
+```
+
+```sh 
+sudo nano /etc/apache2/sites-enabled/000-default.conf
+```
+
+```
+<VirtualHost *:80>
+   [...]
+   <Directory "/var/www/html/scripts">
+     AllowOverride None
+     Require all granted
+     Options +ExecCGI
+     AddHandler cgi-script .cgi .pl .py .sh
+   </Directory>
+   DocumentRoot /var/www/html
+   [...]
+</VirtualHost>
+```
+
+---
+
+```sh
+#!/bin/bash
+
+echo Content-type: text/html
+echo
+echo hello world
+```
+
+---
+
+## 2. Feladat
+
+- Nézzük meg milyen userként fut a webszerver!
+- Csináljunk egy oldalt, ami kiírja az időt és azt, hogy hány user van belépve!
+- Csináljunk egy oldalt, ami kiírja, hogy hányadik hét van!
+    - hint: `jq`, https://hanyadikhetvan.attiss.eu/api
\ No newline at end of file

feladat.md

+# Gyakorlat
+
+## 0. csatlakozás a VM-hez
+
+[see here](saját%20vm.md)
+
+Ha gondoljátok vagy ha valaki nem nézett videót/jegyzetet és nem érti mi van,
+akkor akár itt érdemes shellt mutogatni.
+
+## 1. saját user létrehozása root jogokkal
+
+Mindenki választ magának usert (nem kell schacc legyen), aztán
+```shell
+sudo useradd -s /bin/bash -m bela
+```
+`-m` = legyen home mappa  
+ha megadják a `-G sudo` kapcsolót is, akkor nice, már van is sudo joguk,
+a kövi rész skippelhető
+
+legyen jelszó:
+```shell
+passwd bela
+```
+
+legyen sudo:
+```shell
+sudo usermod -aG sudo bela
+```
+ezzel lett sudo joga
+
+### Alternatív
+
+legyen user:
+```shell
+sudo adduser bela
+```
+
+legyen sudo:
+```shell
+sudo adduser bela sudo
+```
+
+---
+a végén jelentkezzetek át az új userbe
+
+
+## 2. shell játszadozás
+
+Feladat: számoljuk meg, hogy a *Bee Movie* szövegében hányszor szerepel a
+kis és nagybetűs "bee" szó.  
+Ha lehet oldják meg maguktól, de vezethetitek is.
+
+A szöveg elérhető itt: https://home.sch.bme.hu/~mikewashere/linux/best_movie_ever.txt
+
+Vezessük végig őket lépésenként, hogy mit csinál a csomó parancs:
+
+```shell
+curl https://home.sch.bme.hu/~mikewashere/linux/best_movie_ever.txt
+```
+-> letölti a szöveget és kiírja
+
+olvassunk be less-sel
+```shell
+curl https://home.sch.bme.hu/~mikewashere/linux/best_movie_ever.txt | less
+```
+
+
+Na de oldjuk is meg a feladatot:
+
+Okés, de:  
+számolni a `wc`-vel lehet, de kéne szűrni a bee-kre, arra kell a `grep`,  
+de:  
+a `grep` az egész sort odaadja, amiben egyszer is ott a bee
+tehát szét kéne szedni úgy, hogy minden szó külön sor legyen  
+Megoldás: cseréljük ki a space-eket `\n`-re a `tr` használatával.
+
+```shell
+curl https://home.sch.bme.hu/~mikewashere/linux/best_movie_ever.txt | tr " " "\n"
+```  
+Az idézőjelek fontosak.
+
+Most már soronként jelenik meg, mehet a grep.  
+```shell
+curl https://home.sch.bme.hu/~mikewashere/linux/best_movie_ever.txt | tr " " "\n" | grep -i bee
+```  
+Na most van egy csomó bee-nk, mehet a wc.
+
+```shell
+curl https://home.sch.bme.hu/~mikewashere/linux/best_movie_ever.txt | tr " " "\n" | grep -i bee | wc -l
+```
+Elvileg **171**-et kéne kapni.
+
+Ha zavar minket a curl letöltés mutató szövege, akkor adjunk neki egy `2>/dev/null`-t.
+
+```shell
+curl https://home.sch.bme.hu/~mikewashere/linux/best_movie_ever.txt 2>/dev/null | tr " " "\n" | grep -i bee | wc -l
+```
+
+2 = stderr, /dev/null = speciális file, amibe bármit írhatunk, elveszik
+
+---
+
+Feladat: A méhek száma évről évre csökken, *let's save the bees*!
+Írjuk bele a "bee"-ket egy fileba!
+
+```shell
+curl https://home.sch.bme.hu/~mikewashere/linux/best_movie_ever.txt | tr " " "\n" | grep -i bee > save_the_bees.txt
+```
+
+`nano save_the_bees.txt`-vel megleshetjük, hogy működött.
+
+## 3. Script irogatás
+
+Feladat: csináljunk egy scriptet, ami megmenti a méheket, és egy tehénnel kimondatja, hogy
+hányan vannak.
+
+A `cowsay` nincs fent a VM-eken, telepítsétek.
+```shell
+sudo apt install cowsay
+```
+Nyugodtan próbálgassátok ki.
+```shell
+cowsay hello
+echo hello | cowsay
+```
+
+Csináljunk nano-val (vagy vim-mel, ha valaki azt szereti inkább)
+egy új file-t, nevezzük el `bees.sh`-nak.
+
+```shell
+nano bees.sh
+```
+
+Vezessétek végig őket a megírásán vagy csináltassátok meg velük, itt egy mintamegoldás:
+```shell
+#!/bin/bash
+
+curl https://home.sch.bme.hu/~mikewashere/linux/best_movie_ever.txt | tr " " "\n" | grep -i bee > save_the_bees.txt
+echo $(cat save_the_bees.txt | wc -l ) méh van. | cowsay
+```
+*A felső sor opcionális.*
+
+Ha megvan, futtassátok:
+```shell
+bash bees.sh
+```
+vagy, ha odatettétek az elejére a shebang-et:
+```shell
+chmod +x bees.sh
+./bees.sh
+```
+
+## 4. Webszerver telepítése
+
+Feladat: állítsanak be egy webszervert nginx-el, és rakjanak ki valami szöveget.
+
+Telepítés:
+```shell
+sudo apt install nginx
+```
+
+Magától elindul, nézzük meg:
+```shell
+systemctl status nginx 
+```
+
+Alapból a `/var/www/html`-t szolgálja ki, menjünk oda
+```shell
+cd /var/www/html
+ls -la
+```
+Látjuk, hogy root-é minden, adjuk oda a www-data-nak, magunknak meg adjunk www-data csoporttagságot
+és adjunk a csoportnak minden jogot rekurzívan.
+```shell
+sudo chown -R www-data:www-data /var/www/html
+sudo usermod -aG www-data bela
+sudo chmod -R g+rwx /var/www/html
+```
+`-R`: rekurzívan  
+vegyük fel a csoporttagságot, ehhez vagy ki és bejelentkezni kell vagy:
+```shell
+newgrp www-data
+```
+
+Most töröljük a korábbi weblapot és tegyünk ki valami sajátot:
+```shell
+cd /var/www/html
+rm index.nginx-debian.html
+nano index.html # írjanak bele bármi funky szöveget
+```
+
+## 5. Csináljunk tűzfalat
+
+Az UFW (Uncomplicated FireWall) egy egyszerű tűzfalvezérlő progi.
+Nézzük meg fut-e:
+```shell
+sudo systemctl status ufw
+sudo ufw status
+```
+Fut, de ki van kapcsolva.
+
+Előszöris engedjük be az SSH-t és http-t, hogy ne zárjuk ki magunkat:
+```shell
+sudo ufw limit ssh
+sudo ufw allow http
+```
+
+A limit-tel limitálva engedélyeztük az ssh-t, így nem lehet gyorsan brute-force-olni.
+
+és kapcsoljuk be:
+```shell
+sudo ufw enable
+sudo ufw status
+```
+nice.
+
+## Extra feladatötlet turbóújoncoknak
+
+Csináljanak valami fancy weboldalt. Bármit.
+
+

hf.md

+# Házi Feladatok
+
+## Alap házi
+
+Csinálj felhasználót a csapattársaidnak a VM-edre úgy, hogy
+hozzáférjenek a statikus weboldalak mappájához,
+ezután próbáljátok ki, hogy valóban hozzáfértek-e
+és ha igen, rakjatok valami funky html-t a mappába ajándékba a társaitoknak.
+
+Hint: adduser/useradd, usermod/gpasswd, chmod.
+
+## Side Quest
+
+Állíts be kulcsos hitelesítést a képzés VM-eden az SSH kapcsolatodhoz.
+Ehhez szükséged lesz egy privát és egy publikus kulcsra a kliensgépeden.
+
+Hint: ssh-keygen.
+
+## Expert (sudo)
+
+Nyomozz hogyan és miért műküdik a sudo parancs!
+Ha megtaláltad próbáld meg összefoglalni nekünk néhány mondatban.
+
+Hint: setuid
+
+## Expert (Csomag mágus) 
+
+Készíts egy új csomagot (package) egy általad válaszott programból 
+(saját program is lehet), egy általad választott disztribúcióhoz.

index.html

@@ -4,24 +4,83 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
     <title>KSZKépzés Linux</title>
+    <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
+    <meta http-equiv="Pragma" content="no-cache" />
+    <meta http-equiv="Expires" content="0" />
+    <script async defer data-domain="home.sch.bme.hu" src="https://analytics.mikesweb.site/js/plausible.js"></script>
+    <link rel="icon" type="image/x-icon" href="favicon.ico" />
     <link rel="stylesheet" href="https://unpkg.com/docute@4/dist/docute.css">
+    <style>
+        .medium-zoom-overlay {
+            background: #2f3136 !important;
+        }
+    </style>
 </head>
 <body>
     <div id="docute"></div>
     <script src="https://unpkg.com/docute@4/dist/docute.js"></script>
     <script>
-        new Docute({
-            target: '#docute',
-            title: 'Linux',
-            layout: 'wide',
-            highlight: [
-                "bash",
-                "javascript",
-                "html"
-            ],
-            detectSystemDarkTheme: true,
-            darkThemeToggler: true,
-        })
+        async function init() {
+            try {
+                const keys = await caches.keys();
+                for (const key of keys) {
+                    const cache = await caches.open(key);
+                    const cacheKeys = await cache.keys();
+                    for (const k of cacheKeys) {
+                        await cache.delete(k);
+                    }
+                }
+            } catch (e){
+                console.log(e);
+            }
+
+            let tmp = [
+                "linux alapok",
+                "szerver kezelés",
+            ];
+
+            let pages = [];
+
+            tmp.forEach(val => {
+                pages.push({
+                    title: val,
+                    link: encodeURI("/" + val),
+                });
+            });
+
+            new Docute({
+                target: '#docute',
+                title: 'Linux',
+                layout: 'wide',
+                highlight: [
+                    "bash",
+                    "javascript",
+                    "html",
+                    "shell-session"
+                ],
+                detectSystemDarkTheme: true,
+                darkThemeToggler: true,
+                nav: [
+                    {
+                        title: "/",
+                        link: '/'
+                    },
+                    {
+                        title: "Source",
+                        link: "https://git.sch.bme.hu/mikewashere/linux-presentation"
+                    },
+                ],
+                sidebar: [
+                    {
+                        title: "linux/",
+                        children: pages,
+                    },
+                ],
+                fetchOptions: { cache: 'no-cache' },
+            });
+            console.log("i like your curiosity");
+        }
+        init();
     </script>
 </body>
-</html>
\ No newline at end of file
+</html>

k8s/deployment.yaml

+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: linux-presentation
+  namespace: kszk-kepzes-site
+spec:
+  selector:
+    matchLabels:
+      app: linux-presentation
+  template:
+    metadata:
+      labels:
+        app: linux-presentation
+    spec:
+      containers:
+      - name: linux-presentation
+        image: harbor.sch.bme.hu/kszk/linux-presentation:latest
+        resources:
+          limits:
+            memory: "64Mi"
+        ports:
+        - containerPort: 80
+      imagePullSecrets:
+      - name: harbor

k8s/ingress.yaml

+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt-prod
+    kubernetes.io/ingress.class: nginx
+    kubernetes.io/tls-acme: 'true'
+    nginx.ingress.kubernetes.io/proxy-body-size: 20m
+    nginx.ingress.kubernetes.io/rewrite-target: /$1
+  name: linux-presentation
+  namespace: kszk-kepzes-site
+spec:
+  rules:
+  - host: ujonc.kszk.bme.hu
+    http:
+      paths:
+      - path: /studies/linux/(.*)
+        pathType: Prefix
+        backend:
+          service:
+            name: linux-presentation
+            port:
+              number: 80
+  tls:
+  - hosts:
+    - ujonc.kszk.bme.hu
+    secretName: kszkepzes-cert

k8s/service.yaml

+apiVersion: v1
+kind: Service
+metadata:
+  name: linux-presentation
+  namespace: kszk-kepzes-site
+spec:
+  selector:
+    app: linux-presentation
+  ports:
+  - port: 80
+    targetPort: 80