Computer Tips - What's that extra dot in my "ls -l" listing?

Date: 2012jun11 OS: Linux Distro: RedHat/Fedora/CentOS Q. What's that extra dot in my "ls -l" listing? A. It means there's a SELinux context on the file. For example:
ls -ld /tmp
on my Fedora box gives:
drwxrwxrwt. 33 root root 50176 Jun 11 10:37 /tmp/ ^ Special SELinux stuff is present
A plus (+) in that position indicates an ACL (Access Control List)