Home / server / Questions / 554096
In Process
Adam Ryczkowski
Asked: 2013-11-12 01:50:09 +0800 CST

How to find out previous start-up time, so one can read `/var/log/dmesg.0` log?

  • 772

That should be a quick one:

I'm running a small server, and one day discovered, that one of the LXC containers inside is down. I started it again, but I want to find out, for how long it was down.

I guess, that the most detailed information will be in dmesg logs, but to read timestamps in them I need to know exact moment the system was started during that session.

log-files

2 Answers

  1. You can /proc/uptime for this, the first number there is the uptime of the machine in seconds. Also, there's dmesg -T for human readable output.

    • 1 
  2. [me@server]$ last reboot
reboot   system boot  2.6.32-279.22.1. Thu Oct  3 08:35 - 10:59 (39+03:23)
    • 1