Dear all.... any one can help me??? I am aware of monitoring disk space using nagios (disk partitions with check_disk). Now, I have a situation that I would like to monitor size of an individual file through nagios. e.g /var/lib/mysql/somedatabase/vlog.myd, this file will grow very fast and i would like to monitor if the size of this file crosses 1.5 G. I'm already used 'check_file' but this can't solved my problem. The file in another machine, that 'check_file' can't do it.