System messages display on the console device. The text of most system messages has the following format:
[ID msgid facility.]
For example:
[ID 672855 kern.notice] syncing file systems...
If the message originated in the kernel, the kernel module name is displayed. For example:
Oct 1 14:07:24 mars ufs: [ID 845546 kern.notice] alloc: /: file system full
When a system crashes, it might display a panic message on the system console, formatted as follows:
panic: error message
Less frequently, the following message might be displayed instead of the panic message:
Watchdog reset !