topic Re: Last lines in the fileself in Operating System - HP-UX

Last lines in the fileself

Oscar Paredes Alvarez — Mon, 30 May 2005 12:37:30 GMT

Hi,

We have one process and generated file log.
This file log contain 3412312 lines and is necesary for futures review.

I need compress this file log and only less the
last 10000 lines...

Any sugestion ?...
Thanks ....

Re: Last lines in the fileself

Henk Geurts — Mon, 30 May 2005 12:49:49 GMT

hi Oscar

similar thread with good solutions:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=426892

regards,
Henk

Re: Last lines in the fileself

Muthukumar_5 — Tue, 31 May 2005 07:33:56 GMT

You can extract last 10000 lines from that log file and put into another file. Remote / archive the original log file.

1. tail 10000 >
2. Using awk / sed + wc we can do it.

Re: Last lines in the fileself

Pete Randall — Tue, 31 May 2005 07:37:32 GMT

Be aware that tail will very likely fail because it is limited by the 20K buffer it uses. From the man page:

"WARNINGS Tails relative to end-of-file are stored in a 20-Kbyte buffer, and thus are limited in length."

Pete

Re: Last lines in the fileself

Gopi Sekar — Tue, 31 May 2005 08:05:28 GMT

use the tail command. eg: tail -n 10000 file

if it proves to be failing then write a program of your self which seeks to end of file and reads the line in reverse.

Hope this helps,
Gopi

Re: Last lines in the fileself

Oscar Paredes Alvarez — Tue, 31 May 2005 10:02:36 GMT

Thanks.

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