File Permissions II

Read, Write and Execute ("RWX") permission for 3 different sets of users:
User (the file owner), Group, Other (users not in the same group)
        $ ls -l
-rwxr-xr-x    1 root     root        72460 2003-10-05 12:10 /bin/ls

Change permissions with "chmod"
User = "u", Group = "g", Other = "o"
All = "a"
$ chmod a+r <list of files>
$ chmod a+r,go-wx,u+w <list of files>