Downloaded and installed it in what form? When I did it, I just installed from the RPM compiled for my distribution. Then all that I needeed to do was
Code:
$ sudo chkrootkit
Password:
ROOTDIR is `/'
Checking `amd'... not found
Checking `basename'... not infected
Checking `biff'... not found
Checking `chfn'... not infected
Checking `chsh'... not infected
Checking `cron'... not infected
.
.
.