Install chkrootkit

To install chrootkit, SSH into server and login as root.

At command prompt type: cd /root/

At command prompt type: wget ftp://ftp.pangeia.com.br/pub/seg/pac/chkrootkit.tar.gz

At command prompt type: tar xvzf chkrootkit.tar.gz

At command prompt type: cd chkrootkit-0.47

At command prompt type: make sense

To run chkrootkit

At command prompt type: /root/chkrootkit-0.47/chkrootkit

Make sure you run it on a regular basis, perhaps including it in a cron job.