关于chkrootkit的问题？？？？？？？？？？？？

coolfish

我安装了chkrootkit之后，使用一下，结果这样，为什么？有问题吗？

ROOTDIR is `/'
Checking `amd'... not infected
Checking `basename'... not infected
Checking `biff'... not infected
Checking `chfn'... INFECTED
Checking `chsh'... INFECTED
Checking `cron'... not infected
Checking `date'... INFECTED
Checking `du'... not infected
Checking `dirname'... not infected
Checking `echo'... not infected
Checking `egrep'... not infected
Checking `env'... not infected
Checking `find'... not infected
Checking `fingerd'... not infected
Checking `gpm'... not found
Checking `grep'... not infected
Checking `hdparm'... not found


有3个INFECTED?

Checking `chfn'... INFECTED
Checking `chsh'... INFECTED
Checking `date'... INFECTED

请教，多谢！