dot at the end of file permissions?!

[startover]

I get the following as the result of invoking ls on a file:

ls -l foobar
-rwxrwxr-x.  1 root root  9319 Mar 30 08:05 foobar

what does that dot at the very end of file permissions mean?
I mean the dot at the end of "-rwxrwxr-x."
and how can I make a file have that dot at the end of its permission by using chmod?

thanks

[stoat]

https://fedoraproject.org/wiki/Fedor..._some_files.3F

[oxala]

Awesome! I had wondered about that "dot" myself .... and now I know!