/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/ is in icingaweb2-module-monitoring 2.1.0-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/IcingaCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Instance/
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Instance/DisableNotificationsExpireCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Instance/ToggleInstanceFeatureCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/AcknowledgeProblemCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/AddCommentCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/DeleteCommentCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/DeleteDowntimeCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/ObjectCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/ProcessCheckResultCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/PropagateHostDowntimeCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/RemoveAcknowledgementCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/ScheduleHostCheckCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/ScheduleHostDowntimeCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/ScheduleServiceCheckCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/ScheduleServiceDowntimeCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/SendCustomNotificationCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/ToggleObjectFeatureCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Object/WithCommentCommand.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Renderer/
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Renderer/IcingaCommandFileCommandRenderer.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Renderer/IcingaCommandRendererInterface.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Transport/
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Transport/CommandTransport.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Transport/CommandTransportInterface.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Transport/LocalCommandFile.php
/usr/share/icingaweb2/modules/monitoring/library/Monitoring/Command/Transport/RemoteCommandFile.php