Ubuntu Linux: View Boot Log

by on July 21, 2009 · 2 comments· LAST UPDATED July 21, 2010


How do I view detailed boot log of my Ubuntu system?

The dmesg command print or control the kernel ring buffer. You can also use files located in /var/log/ directory to see snapshot of boot messages. To see logs type the following command at shell prompt (open the terminal and type the commands):
$ dmesg | less
You can use the following two files as well:

  • /var/log/boot.log
  • /var/log/dmesg

To see them type:

less /var/log/boot.log
less /var/log/dmesg
grep error /var/log/dmesg
grep something /var/log/boot.log
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{ 2 comments… read them below or add one }

1 Niklas May 16, 2012 at 10:49 am

On a Ubuntu/Debian, Bootlog is turned of by default. Turn it on like this:

vi /etc/default/bootlogd

# Run bootlogd at startup ?


2 العاب March 25, 2015 at 9:18 am

hello, how to get boot log on boot remotly , i have a linux server in my office and i remote retart it but some times apache or mysql crach on boot time and i cant knew why i must go to my office and connect monitor to see the error,
is there any way to see live boot message ?
thank you


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