Rootkit Log Problems Possibly

[owhosting]

When I try to view rootkit log i get the following...

Code:

/var/log/rkhunter.log:
  /var/log/rkhunter.log doesn't exist or is empty
  /var/log/chkrootkit.log:
  /bin/sh: root: command not found

Have I done something wrong or is this ok?