pre-pend log timestamp

Posted on October 30, 2014December 16, 2015 by admin

Adds a timestamp before alog from a script

awk -v sec=$(date -u +%s) '{print strftime("%Y-%m-%d %H:%M:%S",sec), $0; fflush();}'

in cron :

awk -v sec=$(date -u +\%s) '{print strftime("\%Y-\%m-\%d \%H:\%M:\%S",sec), $0; fflush();}'

So :

# echo hello world | awk -v sec=$(date -u +%s) '{print strftime("%Y-%m-%d %H:%M:%S",sec), $0; fflush();}'

2014-10-30 08:40:26 test

nJoy 🙂

Ryan says:

November 5, 2014 at 2:13 pm

Can you update this post to remove the smart quotes and long (en/em) dash? I am having trouble using this example on CentOS 5.x and I think it is a formatting problem.

Thanks!

Reply
Ryan says:

November 5, 2014 at 2:21 pm

CentOS 5.x comes with awk 3.1.5 which does not support the three parameter version of strftime. Removing the UTC paramter from strftime fixes the script so it runs and outputs in server local time rather than UTC.

# echo hello world | awk -v sec=$(date –utc +%s) ‘{print strftime(“%Y-%m-%d %H:%M:%S”,sec), $0; fflush();}’
2014-11-05 09:19:16 hello world

Reply
1. admin says:
  
  March 13, 2015 at 4:10 pm
  
  Thanks for your feedback.
  
  Reply