rotate logs | CRUX

root@netkicker:~# cat /etc/cron/monthly/syslog
#!/bin/sh
#
# /etc/cron/weekly/syslog: rotate log files
#

/root/sbin/logrotate auth cron debug kernel mail messages net all

# End of file

root@netkicker:~# cat ~/sbin/logrotate
#!/bin/sh
#
# logrotate: rotate and compress logfile(s)
#

export PATH='/bin:/usr/bin'

ldir="/var/log"

[ $# -lt 1 ] && \
{ echo "usage : `basename $0` <file> [<file> ..]" ; exit 1 ; }

for f in $* ; do
    # skip if does not exists or empty
    [ -s $ldir/$f ] || continue
    # keep up to 9
    for i in {8..0} ; do
        [ -f $ldir/old/$f.$i.xz ] && \
        mv -f $ldir/old/$f.$i.xz $ldir/old/$f.$((1+i)).xz
    done
    cp -p $ldir/$f $ldir/old/$f.$i && \
    : > $ldir/$f && xz $ldir/old/$f.$i
done

# End of file