Hi. I'm trying to add a new user to my system. The new user is added, but for some reason, disappears! Here's what I've done. Add the user: Code: thefuzzy0ne:/home# adduser daz Adding user `daz' ... Adding new group `daz' (1002) ... Adding new user `daz' (1001) with group `daz' ... Creating home directory `/home/daz' ... Copying files from `/etc/skel' ... Enter new UNIX password: Retype new UNIX password: passwd: password updated successfully Changing the user information for daz Enter the new value, or press ENTER for the default Full Name : Room Number : Work Phone : Home Phone : Other : Is the information correct? [y/N] y Add the new user to the group "shares": Code: thefuzzy0ne:/home# adduser daz shares Check /etc/passwd to make sure the user has been added (as this problem keeps happening): Code: thefuzzy0ne:/home# tail -n3 /etc/passwd web6:x:5003:5005::/var/clients/client4/web6:/bin/false web7:x:5004:5006::/var/clients/client3/web7:/bin/false daz:x:1001:1002:,,,:/home/daz:/bin/bash Good, the user is there, so now I want to get on with the housekeeping I set out to do: Code: thefuzzy0ne:/home# cd /mnt/ thefuzzy0ne:/mnt# chown daz ./* chown: `daz': invalid user What the heck? This can't be right... Code: thefuzzy0ne:/home# tail -n3 /etc/passwd getmail:x:5001:5001::/etc/getmail:/bin/sh web6:x:5003:5005::/var/clients/client4/web6:/bin/false web7:x:5004:5006::/var/clients/client3/web7:/bin/false The last added user has been deleted. What's going on? All that's running is a basic system with ISPConfig 3 and dependencies. Is it ISPConfig that's doing this? Is there any way to add a user manually without it being removed again? Many thanks. EDIT: I suspect the problem may have something to do with rkhunter. I'm not sure what it does or how it works, but there is a copy of the passwd file in /var/lib/rkhunter/tmp/passwd.