LOG ROTATION IN REDHAT LINUX

Log Rotation

Features:

1. Rotation of logs based on criteria
•size
•age (daily, weekly, monthly)

2. Compression

3. Maintain logs for a defined period

•/etc/logrotate.conf - primary (global) config file for all logs
•-can be overriden by context-sensitive files. i.e. apache
•run 'man logrotate'
•/etc/logrotate.d - directory for logs to be rotated
•-httpd - used to rotate Apache logs

/var/log/httpd/*log
{
missingok
notifempty
sharedscripts
postrotate
/bin/kill -HUP `cat /var/run/httpd.pid 2>/dev/null` 2> /dev/null || true
endscript
}

Task:

Setup rotation rule for Cisco log

1. Create entry in: /etc/logrotate.d based on /etc/logrotate.d/syslog

2. Modified the entry to rotate based on new criteria

3. Rotated using: 'logrotate /etc/logrotate.conf'

•Note: Force using: 'logrotatate -f /etc/logrotate.conf'