It sounds like you're running linux on a PC. On PC's the backspace key automatically sends a ^?.
On Linux on a PC it will automatically set the ^? at boot for the backspace command. However on Sun OS (Eskimo's Shell server) the default backspace key sends a ^H. On the PC terminal emulator on windows it automatically detects what windows sends as a backspace command. On linux this detection does not happen because the normal xterm programs don't bother to check for that when telneting to a remote server. To solve this problem, after connecting to eskimo, type the following:
stty erase ^?
and for the charature, actually hit the backspace key to get it. Another way to fix this is to put that line in your .profile
I'm not sure if CSH uses the .profile or a csh defined profile file. It'll probably be a .csh_rc if it's not the .profile. These files can be found in your home directory on eskimo. Let us know how it goes.