Hostname problem, and others

[gaeilgeboy]

Ok, I have one of many of the typical problems that you find with people new to FreeBSD. I keep getting this error message when i load up:

Could not look up internet adderss for setanta. 
This will prevent Xfce from operating correctly. 
It may be possible to correct the by adding 
setanta to the file /etc/hosts on your system.

Where setanta is the hostname. I entered "hostname setanta" and the command line. Here's the relevant excerpts from the /etc files:

In /etc/hosts

::1 localhost 
127.0.0.1 localhost 
192.168.2.121 localhost.localdomain localhost setanta.

And in /etc/rc.conf

defaultrouter="192.168.2.254" 
hostname="setanta" 
ifconfig_fxp0="inet 192.168.2.121 netmask 225.225.225.0"

I'm not too sure whether the above IP addresses are correct, or even how to find the correct ones, so any help would be greatly appeciated!

Also, is there and command to list the hardware? I used dmesg, but I can't find much stuff on it. Particularly, I'm looking to see what kind of sound card is in the laptop, if any.

Finally, I keep getting the error message "write failed, filesystem is full", even though I've deleted a lot of stuff from my laptop. There's only two users on it, root and "cathal". How do you change the disk space given to each user?

Thanks,
Cathal