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- Usage: cwtmp [filename [name-prefix]]
- cwtmp compresses a wtmp file by discarding the uninteresting utmp
- entries that make up a large fraction of the typical wtmp file.
- If no filename is given, /etc/wtmp is read.
- utmp entries in the file are written to the output,
- except entries of type LOGIN_PROCESS and INIT_PROCESS,
- which are skipped. If a name-prefix is given, entries
- whose ut_user field begins with the prefix are also skipped.
-