- apache - . SGID, . , - " " .
[17:57] progman@proglap /tmp/test $ ls -al /tmp/test
total 9
drwxrwsr-x 2 root users 48 Apr 1 17:55 .
drwxrwxrwt 36 root root 9264 Apr 1 17:53 ..
, SGID, - , (progman) am. , , .
[17:55] proglap ~ # touch /tmp/test/x
root. :
[17:57] progman@proglap /tmp/test $ ls -la /tmp/test
total 9
drwxrwsr-x 2 root users 72 Apr 1 17:59 .
drwxrwxrwt 36 root root 9264 Apr 1 17:53 ..
-rw-r--r-- 1 root users 0 Apr 1 17:59 x
, root, users, I
[18:00] progman@proglap /tmp/test $ rm x
rm: remove write-protected regular empty file `x'? y
[18:01] progman@proglap /tmp/test $ ls -la /tmp/test
total 9
drwxrwsr-x 2 root users 48 Apr 1 18:01 .
drwxrwxrwt 36 root root 9264 Apr 1 17:53 ..
, chmod, , rw-r--r-- - . chmod, umask, , chown.