BIOS Boot path, soft or hard startup?

HarleyVRodRed · 11-03-2017, 01:13 PM

Looking for a way to tell if the system started from a powered off state or just a soft reboot/restart. Platform would be RedHat and Suse.

Thanks in advance for any help,
-Tim

jsbjsb001 · 11-03-2017, 01:32 PM

Quote:

Originally Posted by HarleyVRodRed

Looking for a way to tell if the system started from a powered off state or just a soft reboot/restart. Platform would be RedHat and Suse.

Thanks in advance for any help,
-Tim

You can try the following command to see a list of reboots:

Code:

last reboot

Hope this helps.

HarleyVRodRed · 11-03-2017, 01:51 PM

Thanks could you explain how that can tell me if it was a hard or soft boot? Is there a difference here I'm missing telling me it started from a powered off state?

jsbjsb001 · 11-03-2017, 02:00 PM

Quote:

Originally Posted by HarleyVRodRed

Thanks could you explain how that can tell me if it was a hard or soft boot? Is there a difference here I'm missing telling me it started from a powered off state?

I've just run the above command on my box:

Code:

reboot   system boot  4.12.2-1.el7.elr Fri Nov  3 18:56 - 05:23  (10:26)    
reboot   system boot  4.12.2-1.el7.elr Fri Nov  3 12:58 - 05:23  (16:24)

I know I started it the first time just before 1pm (12:58) and then powered it off ("hard shutdown"). And then I powered it on just before 7pm from memory (18:56). I highlighted the times in bold above for you.

The long and short of it: It's the times listed that give you a clue.

You can also look at the following to help you know more:

Code:

/var/log/messages

I don't know any better ways than this though.

HarleyVRodRed · 11-06-2017, 11:20 AM

Thanks for the suggestions but I'm not seeing anything telling me this was a soft reboot from a hard one.

Anyone else have any ideas? ACPI possibly?