RKhunter使ってスキャンしてみたら、こうやって大量にWarning出るけど、これ何？
お前らこんな出る？

$ sudo rkhunter --check --sk
[ Rootkit Hunter version 1.4.6 ]

Performing file properties checks
Checking for prerequisites [ Warning ]
/usr/sbin/adduser [ OK ]
/usr/sbin/chroot [ OK ]
/usr/sbin/cron [ OK ]
/usr/sbin/groupadd [ Warning ]
/usr/sbin/groupdel [ Warning ]
/usr/sbin/groupmod [ Warning ]
/usr/sbin/grpck [ Warning ]
/usr/sbin/nologin [ Warning ]
/usr/sbin/pwck [ Warning ]
/usr/sbin/rsyslogd [ OK ]
/usr/sbin/sshd [ Warning ]
/usr/sbin/useradd [ Warning ]
/usr/sbin/userdel [ Warning ]
/usr/sbin/usermod [ Warning ]
/usr/sbin/vipw [ Warning ]
/usr/sbin/unhide [ OK ]