I was supposed to left my device always on since Monday

last reboot

give me

 reboot   system boot  4.4.0-98-generic Wed Dec  6 08:52   still running
 reboot   system boot  4.4.0-98-generic Mon Dec  4 09:40 - 18:12 (1+08:31)

is it correct?


See man last:

last searches back through the /var/log/wtmp file (or the file designated by the -f option) and displays a list of all users logged in (and out) since that file was created. One or more usernames and/or ttys can be given, in which case last will show only the entries matching those arguments. Names of ttys can be abbreviated, thus last 0 is the same as last tty0.

For your command last reboot:

The pseudo user reboot logs in each time the system is rebooted. Thus last reboot will show a log of all the reboots since the log file was created.

Shows you number of reboots the system went through, and reboot and shutdown are pseudo-users for system reboot and shutdown, respectively.

| improve this answer | |
  • i don't understand why 2 rows and not a one? i'm only user of system. Ok. i have to consult famous man. – Yurij Dec 6 '17 at 6:25
  • How many times have you reboot since log file was created, and is this a fresh install? Mine is 13 lines and I am the only user! – George Udosen Dec 6 '17 at 6:35
  • one time. Monday – Yurij Dec 6 '17 at 6:37
  • fresh install? no, this is ubuntu re-cloned by clonezilla. from one hdd to other. i have no problem i believe i m fine – Yurij Dec 6 '17 at 6:41
  • one strange - uname -r 4.4.0-98-generic at boot time grub show 101 kernel – Yurij Dec 6 '17 at 6:43

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