What is the plus sign at the end of the permissions telling me?
ls -l total 4 drwxrwxrwx+ 2 benson avahi-autoipd 4096 Jan 27 17:37 docs
Here's the context:
cat /etc/issue \CentOS release 5.3 (Final) Kernel \r on an \m
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It means your file has extended permissions called ACLs.
You have to run
getfacl <file> to see the full permissions.
See Access Control Lists for more details.
via man page 'ls'
"If the file or directory has extended security information, the permissions field printed by the -l option is followed by a '+' character."
This generally means the file is encumbered with access restrictions outside of the traditional Unix permissions - likely Access Control List (ACL).