I am trying to monitor a mssql database with nagios. I understand there is a plugin called check_mssql.sh under the contrib directory, but i'm not sure how to install it. Do I just copy it into /usr/local/nagios/libexec directory? When I do and then try to execute it from command line I get command not found as well as in Nagios service details? I may also need guidance on how exectly to run a nagios plugin from command line.