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Linux:Users, Groups, Rights változata

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= Permissions =
<kivonat>chmod, chown, chgrp, id, su</kivonat>
* Create an empty file in your home directory named Test! <megoldas>
<code lang="bash">
feri@aries:~$ touch Test
</code></megoldas>
* Set permissions for this file: the owner must be able to read, write and execute, members of the group should read and execute, others do not have any permissions! <megoldas>
<code lang="bash">
feri@aries:~$ chmod 750 Test
</code></megoldas>
* Change the ownership of this file! The new owner should be the system administrator! (Why doesn't it work?) <megoldas>
<code lang="bash">
feri@aries:~$ chown root Test
</code></megoldas>
* Let the group of that file be the staff group! (Why doesn't it work?) <megoldas>
<code lang="bash">
feri@aries:~$ chgrp staff Test
</code></megoldas>
* Change its privileges to: rw-r--r--! What does it exactly mean? <megoldas>
<code lang="bash">
feri@aries:~$ chmod 644 Test
</code></megoldas>
* When other users run this file, they should have your rights. How can you reach that? <megoldas>
<code lang="bash">
feri@aries:~$ chmod 4755 Test
OR
feri@aries:~$ chmod u+s Test
</code></megoldas>
* This file sould run with the group rights! <megoldas>
<code lang="bash">
feri@aries:~$ chmod 2755 Test
</code></megoldas>
* Create a directory named TestDir! How can you reach that all users be able create files there but be able to to delete only their own files in it! <megoldas>
<code lang="bash">
feri@aries:~$ mkdir testDir
feri@aries:~$ chmod 1777 testDir
</code></megoldas>
* Create a directory named Common! It should be really common, all users must be able to create and delete any files in it. How can you reach it? <megoldas>
<code lang="bash">
feri@aries:~$ mkdir Kozos
feri@aries:~$ chmod 777 Kozos
</code></megoldas>
* Ask your own identifier and your group identifier! <megoldas>
<code lang="bash">
feri@aries:~$ id
</code></megoldas>
* Change to an anoter user temporary! (Use your classmate's name and password!) <megoldas>
<code lang="bash">
feri@aries:~$ su - neighbor
</code></megoldas>
* Review the contens of the /etc/passwd and the /etc/group files! What are the meanings of fields in lines? <megoldas>
<code lang="bash">
feri@aries:~$ cat /etc/passwd
feri@aries:~$ cat /etc/group
</code></megoldas>

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A lap eredeti címe: „https://wiki.koczka.hu/index.php/Linux:Users,_Groups,_Rights”

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