who.pl
emulate look of who, without ip address.
who.pl: A small perl script that emulates the look of who but only shows the names of the users logged in, uses the program 'users' and is usefull for shell servers where one dosen't wish the users to beable to hax0r or DDoS eachother directly (assuming, of course, the admin chowned wtmp and utmp to root:somegroup, then chmod'd them to rw-r----- and SGUID'd 'users' to somegroup).