Dmesg with date possible?

03-19-2014

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a thought - why not clear the messages everyday after storing it into a log file with current date? a cron should do.

---------- Post updated at 11:53 PM ---------- Previous update was at 11:48 PM ----------

I just noticed the logs are already rotated. Not sure if your system does it. Check these files

Code:

root@maximus:/tmp# ls -lrt /var/log/dmes*
-rw-r----- 1 root adm     28 Jan  8 09:39 /var/log/dmesg.4.gz
-rw-r----- 1 root adm  13463 Feb 17 00:53 /var/log/dmesg.3.gz
-rw-r----- 1 root adm  13376 Feb 17 19:41 /var/log/dmesg.2.gz
-rw-r----- 1 root adm  13544 Feb 19 19:57 /var/log/dmesg.1.gz
-rw-r----- 1 root adm  49431 Feb 23 12:36 /var/log/dmesg.0
-rw-r----- 1 root adm  49773 Mar  2 16:27 /var/log/dmesg

On a second thought I guess these are created either when the system boots up or shuts down.

---------- Post updated 03-19-14 at 12:00 AM ---------- Previous update was 03-18-14 at 11:53 PM ----------

Script log_dmesg

Code:

#!/bin/bash
echo "<< Log for $(date) >>" >> /var/log/mydmesg.log
dmesg >> /var/log/mydmesg.log
dmesg -C

Cron entry

Code:

0 0 * * * /path/to/your/script/log_dmesg

and may be include some log rotation logic if needed.

ahamed101

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DATE(1) General Commands Manual DATE(1) NAME
date - print or set the date and time SYNOPSIS
date [-qsu] [[MMDDYY]hhmm[ss]] [+format] OPTIONS
-q Read the date from stdin -s Set the time (implicit for -q or a date string) -u Print the date as GMT -t Use this number of seconds instead of current time EXAMPLES
date # Print the date and time date 0221921610 # Set date to Feb 21, 1992 at 4:10 p.m. DESCRIPTION
With the -q flag or a numeric argument, date sets the GMT time and date. MMDDYY refers to the month, day, and year; hhmmss refers to the hour, minute and second. Each of the six fields must be exactly two digits, no more and no less. date always display the date and time, with the default format for the system. The -u flag request GMT time instead of local time. A format may be specified with a + followed by a printf-like string with the following options: %% % character %A Name of the day %B Name of the month %D mm/dd/yy %H Decimal hour on 2 digits %I Decimal hour modulo 12 on 2 digits %M Decimal minute on 2 digits %S Decimal seconds on 2 digits %T HH:MM:SS %U Decimal week number, Sunday being first day of week %W Decimal week number, Monday being first day of week %X Same as %T %Y Decimal year on 4 digits %Z Time Zone (if any) %a Abbreviated name of the day %b Abbreviated name of the month %c Appropriate date & time (default format) %d Decimal day of the month on 2 digits %e Same as %d, but a space replaces leading 0 %h Same as %b %j Decimal dey of the year on 3 digits %m Decimal month on 2 digits %n Newline character %p AM or PM %r 12-hour clock time with AM/PM %s Number of seconds since the epoch %t Tab character %w Decimal day of the week (0=Sunday) %x Same as %D %y Decimal year on 2 digits SEE ALSO
time(2), ctime(3), readclock(8). DATE(1)

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