Trim a log file

wanna13e · #1 (**permalink**) 06-04-04, 06:03

Hi All,

I'm a newbie in unix. Currently I have this log file that contain past reords and the latest. How should I trim the log file which allow me to keep the recently record of the data?

Thanks

vgersh99 · #2 (**permalink**) 06-04-04, 08:22

1. define 'trim'
2. define 'past/latest'
3. provide sample log file.

wanna13e · #3 (**permalink**) 06-04-04, 11:31

Hi vgersh99,

Sorry for the confusion. As I got a log file which is appended daily after my file transfer. There will be a time stamp and as this log file had not been cleared since a year back. I would like to delete the top part of the file which is back dated. I would like to keep a reference of three months.

The header of the file goes like this;

Wed 2 Jun 2004 1600........

Thks alot.

fla5do · #4 (**permalink**) 06-05-04, 09:36

Hi wanna,
if there is one line daily append to your logfile then use
tail -90 logfile > file; mv file logfile

else

tail -90*[lines daily]

If you want another solution, please give us more informations about your logfile.

wanna13e · #5 (**permalink**) 06-07-04, 02:39

Quote:

Originally Posted by fla5do

Hi wanna,
if there is one line daily append to your logfile then use
tail -90 logfile > file; mv file logfile

else

tail -90*[lines daily]

If you want another solution, please give us more informations about your logfile.

Hi Peter,

Thks alot for the help u given me. The command works perfectly.

Rgds.