After sshing (using putty with X11 enabled) into my virtual box VM, I tried to open an xterm window. However the following command:xterm -sb 500or even /usr/bin/xterm -sb 500returns the error:xterm: No absolute path found for shell: 500I cant seem to figure out what the error even means!EDIT:ls -la /usr/bin/xterm-rwxr-xr-x 1 root root 450888 Sep 28  2012 /usr/bin/xtermalias xterm-bash: alias: xterm: not foundDISTRIB_DESCRIPTION=Ubuntu 12.10NAME=UbuntuVERSION=12.10, Quantal Quetzal
Xterm: No absolute path found for shell: 500
ubuntu;xterm