Originally Posted by monogroover
If you mean the dot at the end of the permissions, eg at the end of drwxr-xr-x. - then it's to show that the directory has extended attributes
(most Linux filesystems support these).
This is correct. The dot at the end of a file permissions listing indicates that ACL's have been set on a file or directory. If you want to see what those ACLs are, you can use the getfacl
command to look at them. To set them (or unset them) you can use the setfacl