Trim application log files on HP-UX 11.0

[Raj Kumar Gulati]

I want to trim application log file in /var/adm/syslog/app.log .

But tail -10000 /var/adm/syslog/app.log > /tmp/app.log.trim does not work as tail -10000 takes only few number of last lines,not last 10000 lines from log file.

I am using HP-UX 11.0.It seems only buffer of 20K is reserved for this tail program.

[Sanjay Kumar Suri]

Use -n to specify the number of lines.

tail -n 10000 /var/adm/syslog/app.log > /tmp/app.log.trim

sks

[Pete Randall]

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

[Steve Steel]

Hi

reverse it

make this a script with file as parameter 1 and lines as parameter 2



file=$1
typeset lines=$2
typeset -i x=$(cat $file|wc -l)
typeset -i z=$x-$lines+1
tail -n +$z $file


Steve Steel