Comments on: dmesg with human readable timestamps

By: Sandro

Sandro — Mon, 15 Sep 2014 14:46:54 +0000

Very good! well done.

By: Johnny Morano

Johnny Morano — Wed, 18 Jun 2014 09:15:44 +0000

In reply to BackSeat. Yes ... but when I wrote this blog post (and code snippit), the option wasn't available ;-) At least not in the version of Debian Squeeze

By: BackSeat

BackSeat — Tue, 17 Jun 2014 08:31:02 +0000

Or just:

$ dmesg -T|head
[Sun Jun 8 10:13:52 2014] Initializing cgroup subsys cpuset
[Sun Jun 8 10:13:52 2014] Initializing cgroup subsys cpu
[Sun Jun 8 10:13:52 2014] Linux version 3.2.0-4-amd64 (debian-kernel@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-14) ) #1 SMP Debian 3.2.57-3+deb7u2
[Sun Jun 8 10:13:52 2014] Command line: BOOT_IMAGE=/boot/vmlinuz-3.2.0-4-amd64 root=UUID=2c60bbd2-7b5d-4f30-a4f0-dcea4410b5f7 ro quiet
[Sun Jun 8 10:13:52 2014] BIOS-provided physical RAM map:
[Sun Jun 8 10:13:52 2014] BIOS-e820: 0000000000000000 – 000000000009dc00 (usable)
[Sun Jun 8 10:13:52 2014] BIOS-e820: 000000000009f800 – 00000000000a0000 (reserved)
[Sun Jun 8 10:13:52 2014] BIOS-e820: 00000000000f0000 – 0000000000100000 (reserved)
[Sun Jun 8 10:13:52 2014] BIOS-e820: 0000000000100000 – 00000000bafc0000 (usable)
[Sun Jun 8 10:13:52 2014] BIOS-e820: 00000000bafc0000 – 00000000bafc3000 (ACPI NVS)

By: Mike

Mike — Wed, 25 Sep 2013 05:07:45 +0000

Hi Johnny,

Thank You for your reply. Well I am still getting error as below:

Use of uninitialized value in printf at ./dm-tes.pl line 7, line 1.

By: Mike

Mike — Wed, 25 Sep 2013 05:02:48 +0000

Hi Johnny,

Thank You for your reply. Well I am still getting error as below:

Use of uninitialized value in printf at ./dmesg.pl line 7, line 1.

By: Johnny Morano

Johnny Morano — Thu, 12 Sep 2013 07:03:48 +0000

In reply to Mike. Hi Mike, I've updated the code snippit, could you test it again? On my Debian it actually works like a charm

By: Mike

Mike — Thu, 12 Sep 2013 01:33:33 +0000

I tried this script on Centos 5.8 and it didn’t worked. It gave error as below with all dmesg line.

Use of uninitialized value in printf at ./dmesg.pl line 7, line 11623.

Here is the dmesg script codes if I am missing somthing here.

#!/usr/bin/perl -wn
use strict;

foreach my $line () {
my ($uptime) = (do { local @ARGV=’/proc/uptime’;} =~ /^(\d+)\./);
$line=~/^\[\s*(\d+)\.\d+\](.+)/;
printf “[%s]%s\n”, scalar localtime(time – $uptime + $1), $2;
}

By: Gaspar Fernandez

Gaspar Fernandez — Sun, 10 Feb 2013 09:01:29 +0000

Good idea!
Also in bash:
$ base=$(cat /proc/uptime | cut -d ‘.’ -f1); seconds=`date +%s`; dmesg | sed ‘s/^\[$.*$\..*\]$.*$$/\1\n\2/’ | while read first; do read second; first=`date +”%d/%m/%Y %H:%M:%S” –date=”@$(($seconds – $base + $first))”`; echo “[$first] $second”; done