/usr/lib/nagios/plugins/check apt

/usr/lib/nagios/plugins/check_apt
APT OK: 0 packages available for upgrade (0 critical updates). |available_upgrades=0;;;0 critical_updates=0;;;0

/usr/lib/nagios/plugins/check_apt
APT CRITICAL: 195 packages available for upgrade (118 critical updates). |available_upgrades=195;;;0 critical_updates=118;;;0

Related

• apt list --upgradeable

• /usr/lib/nagios/plugins/, check_mysql
• Nagios, NRPE, Nagios Cross-Platform Agent (NCPA), nagios.cfg, nrpe, nagios4, nagios3, nagios3stats, check_http, Monitoring-plugins, /usr/lib/nagios/plugins/, Nagios logs, nagios.cfg