logrotate でログファイル名に日付を付ける
/usr/local/apache/logs/access_log {
rotate 50
monthly
compress
postrotate
/bin/kill -HUP `cat /usr/local/apache/logs/httpd.pid 2> /dev/null` 2> /dev/null
EXT=`date +%Y%m%d`
for f in $1;
do mv $f.1 $f.$EXT;
done
endscript
}