network bandwidth check

Hello, I use ipmasq on a dialup - is there any command or tool I can find out how much internet usage each of the computer on the network uses ? thanks -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]

cannot run X apps when 'su'

Hi, when I su as root, I can't run X apps ... Camranh:/home/thanh# Xlib: connection to ":0.0" refused by server Xlib: Client is not authorized to connect to Server emacs: Cannot connect to X server :0.0. Check the DISPLAY environment variable or use `-d'. Also use the `xhost' program to verify th