1. Checks for signs of rootkits on the local system chkrootkit identifies whether the target computer is infected with a rootkit. Some of the rootkits that chkrootkit identifies are: 1. lrk3, lrk4, lrk5, lrk6 (and some variants); 2. Solaris rootkit; 3. FreeBSD rootkit; 4. t0rn (including latest variant); 5. Ambient's Rootkit for Linux (ARK); 6. Ramen Worm; 7. rh[67]-shaper; 8. RSHA; 9. Romanian rootkit; 10. RK17; 11. Lion Worm; 12. Adore Worm. Please note that this is not a definitive test, it does not ensure that the target has not been cracked. In addition to running chkrootkit, one should perform more specific tests. From Debian 3.0r0 APT