Environment variable

NetHack checks the following environment variables:

• NETHACKOPTIONS - You can define configuration options here.
• HACKOPTIONS - The same as NETHACKOPTIONS, but used only if NETHACKOPTIONS was not defined.
• WIZKIT - Allow wizard mode games to start with extra items.
• ROGUEOPTS - Set the ghost name in the Rogue level. For example, setting ROGUEOPTS's value to name=Foo would name the ghost to 'Foo'
• SHOPTYPE - For wizard mode debugging, forces a creation of a special room. For example, setting this to z will make a Treasure zoo on every level.
• SPLEVTYPE - For wizard mode debugging, forces NetHack to use certain layouts for the special levels that have multiple layouts. For example: bigrm-2,minetn-5 would force the 2nd bigroom variant (with the dark and light areas), and the 5th minetown variant (the grotto town).
• NH_HEAPLOG - If the value is a file name and NetHack can write to that file, all memory allocations and release information done by NetHack is written there.
• HOME - Your home directory.
• MAIL - On window ports that support reading mail, this should point to your mail box file.
• MAILREADER - On window ports that support reading mail, NetHack will spawn this mailreader to read your mail.
• TERM - Terminal type.

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