shell script for log rotation

[Shivkumar]

Dear Sirs,

I want to rotate a log file based on its size. Does anyone has any shell script for this ?

Regards,
Shiv

[Joseph Loo · Accepted solution]

hi,

do u have logrotate:

http://hpux.connect.org.uk/hppd/hpux/Sysadmin/logrotate-2.5/

regards.

[Yogeeraj_1]

hi shiv,

see:
http://hpux.connect.org.uk/hppd/hpux/Sysadmin/logrotate-2.5/

this tool is designed to ease administration of systems that generate large numbers of log files. It allows automatic rotation, compression, removal, and mailing of log files. Each log file may be handled daily, weekly, monthly, or when it grows too large.

hope this helps!

kind regards
yogeeraj

[Geoff Wild]

Use logrotate - link above.

Mine is configured like so:

/etc/logrotate.conf

# see "man logrotate" for details
# rotate log files weekly
weekly

# keep 4 weeks worth of backlogs
rotate 5

# create new (empty) log files after rotating old ones
create

# uncomment this if you want your log files compressed
#compress

# packages drop log rotation information into this directory
include /etc/logrotate.d

# no packages own wtmp -- we'll rotate them here
/var/adm/wtmp {
monthly
create 0664 adm adm
rotate 1
}


In /etc/logrotate.d dir, I have maillog and syslog.

# cat syslog
/var/adm/syslog/syslog.log {
rotate 5
weekly
postrotate
/usr/bin/kill -HUP `ps -ef |grep syslogd |awk '{print $2}'` || true
endscript
}

# cat maillog
/var/adm/syslog/mail.log {
rotate 5
weekly
}

Rgds...Geoff

[Rick Garland]

As opposed to size, the logrotate does it job based on time.

Once per week, per month, daily, etc...

I like to rotate by month - I keep the previous 2 months on the system with older logs being on 2 different monthly backups.

Each will have a name that describes its contents and from when. Example, 'sulog.Dec2005', 'sulog.Nov2005', 'syslog.Dec2005', etc...

I know the time frames so I know which archived log file to look for.

[Arunvijai_4]

Hi Shiv,

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=938732

-Arun

[Joel Girot]

Hi Shiv,
If you prefer a shell script, here a good ksh script found on this forum some time ago.(Sorry, I forgot the name of the author). It rotate log files based on size, lifespan, It allow compression, manage the "old" files log generated by the system (eg OLDsyslog.log vs syslog.log), the number of copies to maintain, the security parameters to be applied to the files with chmod and chown. It is very simple, easy to adapt and deserves to be examined.
Regards, Joel

[Michael Mendoza]

Hi All,

Just want to say that the attached script by Joel above works very well in our hpux system.

Thanks!
Michael