it looks like you're trying to start X programs from a command line. X programs generally don't run from a command line (well, you can do xsession forwarding, and exporting, and all sorts of other niceness, but I won't get into that). If the message is something like "DISPLAY variable not set" or something like that, try starting the X server, then running xterm, and then run the xboard program. Usually programs prefaced with x are programs for X11
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