Description: Checks master and slave log positions as well as slave status.

Usage: ./check_mysql_replication.sh -H <slave_host>

Script assumes:
 * it is run from the master server
 * ~/.my.cnf is configured with account which has privileges to SHOW MASTER STATUS and SHOW SLAVE STATUS.
 * English locale

More info at http://blog.endpoint.com/2012/01/mysql-replication-monitoring-on-ubuntu.html