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This is not the current version.
Go to the NetHack Home Page.
(If you have old record and logfile entries from a previous NetHack version, you might want to save copies before they get overwritten by the new empty files; old saved games and bones files won't work with 3.3.1.)
The general documentation Guidebook.txt and the processed man pages nethack.txt and recover.txt should provide an introduction to the game.
The sample config file called dot.nethackrc can be used by copying it to your home directory as .nethackrc and modifying it to your liking.
If you are running X11 copy the nh10.pcf and ibm.pcf font files from /usr/games/lib/nethackdir to a X11 fonts directory (such as /usr/X11/lib/X11/fonts/misc) and run "mkfontdir", then restart X windows to load them. Also consider putting NetHack.ad in /usr/X11/lib/X11/app-defaults or its contents in your .Xdefaults or .Xresources.