ku (killuser) is a utmp based shell admin utility for maintaining shell logins, based on anything from idle time, tty, user name, user group, user GID, if they’re telnetted in, and more. Numerous new features, flags, and bugfixes with this release. 45k.
You can download it from the following link: https://packetstormsecurity.com/files/download/13264/ku-1.1p2-4.tar.gz
Source: https://packetstormsecurity.com/files/13264/ku-1.1p2-4.tar.gz.html