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utmpdump

Dump and load btmp, utmp and wtmp accounting files. More information: https://manned.org/utmpdump.
  • Dump the /var/log/wtmp file to stdout as plain text:
    utmpdump {{/var/log/wtmp}}
  • Load a previously dumped file into /var/log/wtmp:
    utmpdump -r {{dumpfile}} > {{/var/log/wtmp}}

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