I’ve been doing a bit of work on Mandriva recently, and I always forget that there are two places you need to change the host name before it “takes”.
/etc/sysconfig/network add the following line:
hostname is whatever you want the computer to be called.
/etc/hosts just add the hostname after
localhost on the first (and probably only) line in the file. It should look something like:
127.0.0.1 hostname localhost
hostname is the name of the computer.
Do this, reboot, and all should be well.