I see, the permissions of those files forbid no-root user to check them: -rwxr-x--- 1 root root 1687 Mar 19 2006 /etc/cron.daily/01-rkhunter -rw-r----- 1 root root 1519 Mar 19 2006 /etc/rkhunter.conf -rw-r----- 1 root root 333 Jun 6 2005 /etc/sysconfig/rkhunter -rwxr-x--- 1 root root 141594 Mar 19 2006 /usr/bin/rkhunter ..... But I find the hash checking failed on some programs: ...... /usr/bin/watch [ BAD ] /usr/bin/wc [ BAD ] /usr/bin/wget [ OK ] /usr/bin/whereis [ BAD ] /usr/bin/who [ BAD ] /usr/bin/whoami [ BAD ] -------------------------------------------------------------------------------- Rootkit Hunter found some bad or unknown hashes. This can be happen due replaced binaries or updated packages (which give other hashes). Be sure your hashes are fully updated (rkhunter --update). If you're in doubt about these hashes, contact the author (fill in the contact form). -------------------------------------------------------------------------------- What does this mean?