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Check printers and print-queue length using lpstat.

Monitor file count of a directory and notify if the count of files exceedes threshold. Shell script (sh), GPL

the syntax is simple ./check_vmstat DOWNLOAD

This plugin uses the WMI (windows management instrumentation) to enumerate and check bandwidth usage of all connected and optionally disconnected network interfaces on Windows Servers.

This Nagios plugin allows extraction of temperatures from the inexpensive TEMPer USB thermometer on a Linux machine.

Query the SEP Sesam Database for backup stati

Check_service is a plugin that monitors a defined service.

VBScript to check MSMQ metrics via NRPE (NSClient++ with NRPE Listener)

Check Processes via SNMP. Plugin uses UCD SNMP MIB (1.3.6.1.4.1.2021).

Check if a specified user exists and that he has the correct userId, groupId, groupname and supplementary groups.

Simple script for checking the status of a specific CUPS printer.

This plugin is dedicated to NFSv4 monitoring (state, performances, errors) for clients and servers.

This plugin checks established connections on Cisco ASA firewalls.

Plugin to check the mpd status ("playing", "paused", ...) of localhost. Useful when mpd is connected with icecast/shoutcast and should always be playing ;)

Simple Script, that checks some states of DRBD-Devices.

Used to monitor the SHOUTcast server.

Checks the number of files in a directory

Check if physical interfaces are plugged in, and warns when one link is dead.

This checks to make sure the nameserver (-H) has RRSIG records for the zone specified with more than WARNING or CRITICAL days before expiration.

Checks via SNMP if a given process is running on the target System.

This is a simple net-snmp perl script which allow you to do multiplication and addition on return data and the presents the result in nagios.