log rotation

ls -la /var/log/lastlog*
-rw-r--r-- 1 root root 38273316 May 24 22:30 /var/log/lastlog

[root@CHAMP logrotate.d]# vi xenserver
/var/log/boot.log
/var/log/crit.log
/var/log/daemon.log
/var/log/kern.log
/var/log/user.log
/var/log/lastlog
{
    missingok
    sharedscripts
    postrotate
        /bin/kill -HUP `cat /var/run/syslogd.pid 2> /dev/null` 2> /dev/null || true
    endscript
}

[root@CHAMP logrotate.d]# ls -la /var/log/lastlog*
-rw-r--r-- 1 root root        0 May 24 23:08 /var/log/lastlog
-rw-r--r-- 1 root root 38273316 May 24 22:30 /var/log/lastlog.1

# see "man logrotate" for details
missingok

# The compressed files are deleted by another script, based on total disc use.
# Therefore for logrotate we specify a large number.
rotate 9999

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

# Use sharedscripts for efficiency: if we rotate several files that are written
# by the same process, send it SIGHUP just once. For syslogd this causes a
# restart, which the man page says is expensive.
sharedscripts

# 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.