In the Permission column, the first letter indicates whether the listing is a file (-), directory (d) or link (l).
The permissions listed thereafter can be disected into three sets:
The read, write, and execute permissions are referred to as r,w, and x respectively. This item can be considered 'open to everyone' as all sets in this permission group can read, write & execute to the file or directory. Consider this item:
Here the permission setting of rwxr-x--x states that:
the owner has full permissions to the file
the 'group' is allowed to read and execute(run) the file
the 'everyone else' set may only run the file, they aren't allowed to read or modify the contents of the file.
The 'Owner' column lists the owner of the file or directory, and the 'Group' column lists the name of the group for the file or directory.