logrotate

1. logrotate每日執行一次
   

   [root@deyu ~]# find /etc/cron* -name logrotat*
   /etc/cron.daily/logrotate
   [root@deyu ~]# cat /etc/cron.daily/logrotate 
   #!/bin/sh
   
   /usr/sbin/logrotate /etc/logrotate.conf >/dev/null 2>&1
   EXITVALUE=$?
   if [ $EXITVALUE != 0 ]; then
       /usr/bin/logger -t logrotate "ALERT exited abnormally with [$EXITVALUE]"
   fi
   exit 0
   

2. logrotate服務的設定檔
   

   [root@deyu ~]# cat /etc/logrotate.conf
   # see "man logrotate" for details
   # rotate log files weekly
   weekly
   # keep 4 weeks worth of backlogs
   rotate 4
   # create new (empty) log files after rotating old ones
   create
   # use date as a suffix of the rotated file
   dateext
   # uncomment this if you want your log files compressed
   #compress
   # RPM packages drop log rotation information into this directory
   include /etc/logrotate.d
   # no packages own wtmp and btmp -- we'll rotate them here
   /var/log/wtmp {
       monthly
       create 0664 root utmp
   	minsize 1M
       rotate 1
   }
   /var/log/btmp {
       missingok
       monthly
       create 0600 root utmp
       rotate 1
   }
   # system-specific logs may be also be configured here.
   

3. logrotate使用手冊
   

   [root@deyu ~]# man logrotate
   

4. 測試logrotate
   

   [root@deyu ~]# logrotate -v /etc/logrotate.conf 
   reading config file /etc/logrotate.conf
   including /etc/logrotate.d
   reading config file cups
   reading config info for /var/log/cups/*_log 
   reading config file httpd
   reading config info for /var/log/httpd/*log 
   ........
   Handling 13 logs
   
   rotating pattern: /var/log/httpd/*log  weekly (4 rotations)
   empty log files are not rotated, old logs are removed
   considering log /var/log/httpd/access_log
     log does not need rotating
   considering log /var/log/httpd/error_log
     log does not need rotating
   not running postrotate script, since no logs were rotated
   ......
   considering log /var/log/messages
     log does not need rotating
   ......
   rotating pattern: /var/log/wtmp  monthly (1 rotations)
   empty log files are rotated, only log files >= 1048576 bytes are rotated, old logs are removed
   considering log /var/log/wtmp
     log does not need rotating