How Permissions Are Represented
When users log in to a Solaris system, they enter a user name and a password. This mechanism establishes the user's identity and results in the user being awarded a specific user ID (UID) and a group ID (GID) as part of his or her credentials.
When we run the ls -l command in a directory containing files, we see that each file (or directory) also has a UID (the third column) and a GID (the fourth column):
hydrogen# ls -l total 476 drwxrwxr-x 5 adm adm 512 Jul 7 17:47 acct -rw------- 1 uucp bin 0 Jul 7 15:39 aculog -r--r--r-- 1 root root 28 Aug 22 21:52 lastlog drwxr-xr-x 2 adm adm 512 Jul 7 15:38 log -rw-r--r-- 1 root root 101744 Aug 22 21:52 messages drwxr-xrwx 2 adm adm 512 Jul 7 15:38 passwd drwxrwxr-x 2 adm ...
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