Usage: 'set <variable> <value>' or 'unset <variable>'
The list of open-ended environment variables is: allow_gtrain, armoury_even_a, armoury_even_b, armoury_odd_a, armoury_odd_b, berserk_percent, brief, channel_color, channel_output, color_room, cols, confuse, firstaid, format_numbers, fprompt, full_armoury, herb_ver, homepage, ii_opts, keep_sent, login_cmd, logout_cmd, more_lines, msp, no_aid, no_build, party_list, private_info, prompt, quiet_repair, shut_poison_up, shut_save_up, skills_display, tell_from_colour, tell_to_colour, timezone, tprompt, trader_options, whitelist, and who_opts
The list of closed-ended environment variables and their accepted values is: ansi : off or on chime_hour : no or yes color_room : no or yes defense : guild or mud listen_to_pose : no or yes lottery : no or yes no_channels_wrap : no or yes no_combat_prompt : on party_security : accepted, blocked or off