You can use export TERM=vt100 for a one line command as long as you are using the bash shell. However, the system will look for a termcap entry or a termio entry for vt100 depending upon your software needs. Termcap has become arcane, replaced by the termio information. The ncurses library uses the termio. The problem is distributions like Mandrake 7.2 didn't seem to think the termio entries were necessary because they were not included.