Technical Tip: How to check the FortiManager reboot history using CLI command

To check the FortiManager reboot history, there is a CLI command:

diagnose debug klog

The following is an example of the output:

@@@Wed Jan 28 09:51:36 2026
<5>[ 0.000000] Linux version 6.12.32 (root@b884f84d611f) (gcc (GCC) 12.3.0, GNU ld (GNU Binutils) 2.40) 

Copy all outputs into a text editor such as Notepad or Notepad++, and search for 'Linux version'.

The reboot timestamp appears immediately above the 'Linux version' entry.

Relevant documents:

FortiManager CLI Reference