How to Check System Reboot History in Linux

Linux/Unix systems keep the details of the previous reboot. You may also need to know when the system was rebooted last.

Check Last Reboot History

Mostly Linux/Unix systems provide the last command, which provides us the history of last logins and system reboots. These entries are keeps in the lastlog file. Run the last reboot command from the terminal, and you will get the details of the last reboots.

last reboot 

reboot   system boot  3.10.0-957.1.3.e Thu Nov 28 06:14 - 11:56 (65+05:41)
reboot   system boot  3.10.0-957.1.3.e Tue Dec  4 03:51 - 06:14 (359+02:23)
reboot   system boot  3.10.0-862.14.4. Fri Nov  2 06:13 - 03:51 (31+21:38)
reboot   system boot  3.10.0-693.21.1. Sun Oct 21 06:13 - 06:13 (11+23:59)
reboot   system boot  3.10.0-693.21.1. Wed Mar 21 04:16 - 06:13 (214+01:57)
reboot   system boot  3.10.0-693.21.1. Tue Mar 20 15:39 - 04:16  (12:37)
reboot   system boot  3.10.0-693.21.1. Tue Mar 20 15:37 - 15:38  (00:01)
reboot   system boot  3.10.0-693.17.1. Tue Mar 20 12:32 - 15:38  (03:06)

The above output shows that the system was last rebooted on Nov 28 at 06:14 AM.

Check System Uptime

Additionally, you can also use the uptime command to find the system uptime from last booted. Just open the terminal on your system and type uptime and hit enter.

uptime 
 
11:56:48 up 65 days,  5:42,  1 user,  load average: 0.09, 0.11, 0.18

as per above output, the system is running from 65 days, 5 hours and 42 minutes.