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gzcat nethack-3.2.2.tar.gz > nethack-3.2.2.tar tar xf nethack-3.2.2.tarThe gzip package (containing gzip, gunzip, and gzcat) may be obtained from the Free Software Foundation. Versions of tar and patch are also available from the same site.
Apply the patch using the command:
patch < nethack-3.2.3.patch
If you want to keep your save and bones files from 3.2.2, edit patchlevel.h and define VERSION_COMPATIBILITY.