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