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--- so:users_chmod:which_perm_group-en [2026/03/17 14:08]
jkonczak Translation page created
+++ so:users_chmod:which_perm_group-en [2026/03/17 14:09] (current)
jkonczak
@@ Line 1: / Line 1: @@
-====== which_perm_group-en ======
+<html>
+<style>.wU{font-weight:bold;color:#00ff00}.wH{color:#cdcd00}.wD{color:#0000ee}
+.wP{margin:-2px; border: 2px solid red}
+.wS{border-radius: 8px; margin:-2px; border: 2px solid red}
+.wN{border-radius: 8px; margin:-2px; border: 2px solid #aaa; background:
+linear-gradient(to left top, transparent 47%, #aaa 47%, #aaa 53%, transparent 53%)}
+.wG{border-radius: 8px; margin:-2px; border: 2px solid #aaa; background:
+linear-gradient(to right top, transparent 47%, #aaa 47%, #aaa 53%, transparent 53%)}
+p{margin-top:0}pre{margin-bottom:0}
+</style>
+</html>
+Keep in mind that programs such as ''ls'' or ''stat'' display the permissions
+exactly the same regardless if the user that ran them is the owner or not,
+belongs to the group whose the file is or not. One has to tell apart manually
+which chunk of permissions to look at.
+<html>
+<pre>
+<span class="wU">roo</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> whoami
+<span class="wS">roo</span>
+<span class="wU">roo</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> groups
+bipedal jumping
+<span class="wU">roo</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> ls -l
+total 4
+d<span class="wP">rwx</span>r-x--x 5 <span class="wS">roo</span> jumping 160 Mar 16 20:04 myDir
+-<span class="wP">rw-</span>---r-- 1 <span class="wS">roo</span> jumping 249 Mar 16 20:03 someFile
+<span class="wU">roo</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> stat myDir
+  File: myDir
+  Size: 160     Blocks: 0         IO Block: 4096   directory
+Device: 0,30    Inode: 90         Links: 5
+Access: (0<span class="wP">7</span>51/d<span class="wP">rwx</span>r-x--x)  Uid: (1234/  <span class="wS">roo</span>)  Gid: (123/ jumping)
+<span class="wU">roo</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> stat someFile
+  File: someFile
+  Size: 249     Blocks: 8         IO Block: 4096   regular file
+Device: 0,30    Inode: 91         Links: 1
+Access: (0<span class="wP">6</span>04/-<span class="wP">rw-</span>---r--)  Uid: (1234/  <span class="wS">roo</span>)  Gid: (123/ jumping)
+</pre>
+</html>
+The user ''roo'' is the owner of the file, so for the user **only** the first chunk matters.
+<html>
+<pre>
+<span class="wU">tigger</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> whoami
+<span class="wN">tigger</span>
+<span class="wU">tigger</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> groups
+<span class="wS">jumping</span> happy
+<span class="wU">tigger</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> ls -l
+total 4
+drwx<span class="wP">r-x</span>--x 5 <span class="wN">roo</span> <span class="wS">jumping</span> 160 Mar 16 20:04 myDir
+-rw-<span class="wP">---</span>r-- 1 <span class="wN">roo</span> <span class="wS">jumping</span> 249 Mar 16 20:03 someFile
+<span class="wU">tigger</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> stat myDir
+  File: myDir
+  Size: 160     Blocks: 0         IO Block: 4096   directory
+Device: 0,30    Inode: 90         Links: 5
+Access: (07<span class="wP">5</span>1/drwx<span class="wP">r-x</span>--x)  Uid: (1234/  <span class="wN">roo</span>)  Gid: (123/ <span class="wS">jumping</span>)
+<span class="wU">tigger</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> stat someFile
+  File: someFile
+  Size: 249     Blocks: 8         IO Block: 4096   regular file
+Device: 0,30    Inode: 91         Links: 1
+Access: (06<span class="wP">0</span>4/-rw-<span class="wP">---</span>r--)  Uid: (1234/  <span class="wN">roo</span>)  Gid: (123/ <span class="wS">jumping</span>)
+</pre>
+</html>
+The user ''tigger'' is **not** the owner of the file,
+but is in group ''jumping'' whose the file is,
+so for the user **only** the middle chunk matters.
+<html>
+<pre>
+<span class="wU">eeyore</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> whoami
+<span class="wN">eeyore</span>
+<span class="wU">eeyore</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> groups
+<span class="wG">quadruped</span> <span class="wG">glum</span>
+<span class="wU">eeyore</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> ls -l
+total 4
+drwxr-x<span class="wP">--x</span> 5 <span class="wN">roo</span> <span class="wG">jumping</span> 160 Mar 16 20:04 myDir
+-rw----<span class="wP">r--</span> 1 <span class="wN">roo</span> <span class="wG">jumping</span> 249 Mar 16 20:03 someFile
+<span class="wU">eeyore</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> stat myDir
+  File: myDir
+  Size: 160     Blocks: 0         IO Block: 4096   directory
+Device: 0,30    Inode: 90         Links: 5
+Access: (075<span class="wP">1</span>/drwxr-x<span class="wP">--x</span>)  Uid: (1234/  <span class="wN">roo</span>)  Gid: (123/ <span class="wG">jumping</span>)
+<span class="wU">eeyore</span>@<span class="wH">host</span><span class="wD"> /tmp $</span> stat someFile
+  File: someFile
+  Size: 249     Blocks: 8         IO Block: 4096   regular file
+Device: 0,30    Inode: 91         Links: 1
+Access: (060<span class="wP">4</span>/-rw----<span class="wP">r--</span>)  Uid: (1234/  <span class="wN">roo</span>)  Gid: (123/ <span class="wG">jumping</span>)
+</pre>
+</html>
+The user ''eeyore'' is **not** the owner of the file,
+**neither** he is in group ''jumping'' whose the file is,
+so for the user **only** the last chunk matters.

Jan Kończak

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