check_cciss - HP Smart Array Hardware status plugin; needs utils.sh https://exchange.nagios.org/directory/Plugins/Hardware/Storage-Systems/RAID-Controllers/check_cciss--2D-HP-and-Compaq-Smart-Array-Hardware-status/details
check_aacraid - Adaptec array status plugin; needs arcconf cli
check_megaraid - LSI array status plugin; needs megacli http://sysadm.pp.ua/linux/monitoring-systems/python-lsi-megaraid-monitoring.html
check_openmanage - Monitor Dell server hardware status plugin using Dell OpenManage Server;
check_dnsbl - check server IP in dnsbl plugin;
check_eximq - check exim mail queue plugin;
check_migrated - check cpanel migrated accounts plugin;
check_cpu_stats - plugin to check CPU Utilization Statistics (user,system,iowait,idle,nice and steal %) with iostat external program; needs iostat (sysstat package); https://exchange.nagios.org/directory/Plugins/System-Metrics/CPU-Usage-and-Load/check_cpu_stats-2Esh/details
check_connections - plugin to check the number of connections/sockets in a given state (established, syn-sent, syn-recv, fin-wait-1, fin-wait-2, time-wait, closed, close-wait, last-ack, listen, and closing). Uses iproute2's ss tool to retrieve connections https://exchange.nagios.org/directory/Plugins/Network-Connections%2C-Stats-and-Bandwidth/Check-Current-Connections/details
check_mem - check used/free memory plugin http://sysadminsjourney.com/content/2009/06/04/new-and-improved-checkmempl-nagios-plugin/
check_mysql_conn - check mysql connetctions plugins; if password -p not specified - using root username and default users pass (from ~/.my.cnf) http://bergs.biz/blog/2007/05/08/monitor-number-of-active-connections-to-mysql-using-nagios/
check_bandwidth - Plugin for monitoring utilization of network interfaces. example: check_bandwidth --interface eth0 -interval 5
check_bruteforce - check matched string in specified file; check_bruteforce --help
check_raid3ware - check raid 3ware
check_redis_custom - check redis
check_smart - check smart status using smartctl utilite; check_smart --help
check_resolvers - check resolvers using host command (needs bind-utils)
check_md_raid - check software raids
check_snapshots - check created openvz snapshots plugin;
check_mailq_custom - mailq from nagios plugins with fixed path to sudo
check_drdb - check drdb state
check_diskstat - check IO stats of hard drive https://exchange.nagios.org/directory/Plugins/Operating-Systems/Linux/Check-IO-stats-of-one-or-all-disks/details
check_http_content - Checks a URL for specific text https://exchange.nagios.org/directory/Plugins/Websites,-Forms-and-Transactions/check_http_content/details
check_eximq_docker - old check exim mail queue plugin, now used in docker CTs;
check_systemd_service - check if systemd service is running;
check_phpfpm_status_custom - check php-fpm status; modified to support unix socket by -F or --unixsock option; perl-FCGI-Client is required; https://github.com/regilero/check_phpfpm_status
check_file_content - Nagios plugin to check file content; Imported from old pananames production server;
check_lsws_conn - check free lsws slots; check_lsws_conn --help
check_whois - check days left until the domain expiration; check_whois --help Used for whois server check
check_linux_bonding - https://exchange.nagios.org/directory/Plugins/Operating-Systems/Linux/check_linux_bonding/details