/usr/bin/icinga2-build-ca
/usr/bin/icinga2-build-key
/usr/bin/icinga2-sign-key
/usr/sbin/icinga2-disable-feature
/usr/sbin/icinga2-enable-feature
/usr/sbin/icinga2-list-objects
You may install this package on Debian with
apt-get
install icinga2-common