runing x apps exported

[Carl Karsten]

I have 2 boxes: A and B

A has a full ubuntu-desktop install (so X)
B is ubuntu-server, (so no X)

on B: apt-get install openssh-server xterm
on A: ssh -X u at B

check config:
u at B:~$ sudo grep X /etc/ssh/sshd_config
X11Forwarding yes
X11DisplayOffset 10

good.

u at B:~$ xterm
xterm Xt error: Can't open display:
xterm:  DISPLAY is not set

Shouldn't 'apt-get install xterm' install whatever is needed so I can run xterm 
on an exported display?

Carl K