Start service on Debian (9.9)

[yht]

yht@scw-adac3b:~$ sudo service irgsh-chief start
Failed to start irgsh-chief.service: Unit irgsh-chief.service not found.
yht@scw-adac3b:~$ ls -l /etc/init.d/
total 128
-rwxr-xr-x 1 root root 1071 Aug 21  2015 atd
-rwxr-xr-x 1 root root 2597 Feb 12  2017 bootlogd
-rwxr-xr-x 1 root root 1904 Nov 17  2015 cgroupfs-mount
-rwxr-xr-x 1 root root 3049 May  3  2015 cron
-rwxr-xr-x 1 root root 2813 Apr  5  2017 dbus
-rwxr-xr-x 1 root root 3843 Jun 23  2017 docker
-rwxr-xr-x 1 root root 6754 Apr 18  2017 exim4
-rwxr-xr-x 1 root root 2363 Sep  4  2015 haveged
-rwxr-xr-x 1 root root 3809 Mar 22  2017 hwclock.sh
-rwxr-xr-x 1 root root 1646 Jul 25 15:40 irgsh-builder
-rwxr-xr-x 1 root root 1634 Jul 25 15:40 irgsh-chief
-rwxr-xr-x 1 root root 1622 Jul 25 15:40 irgsh-iso
-rwxr-xr-x 1 root root 1628 Jul 25 15:40 irgsh-repo
-rwxr-xr-x 1 root root 2044 Dec 26  2016 kmod
-rwxr-xr-x 1 root root 1364 Mar 17  2017 netfilter-persistent
-rwxr-xr-x 1 root root 4579 Feb 15  2017 nginx
-rwxr-xr-x 1 root root 1561 May  7  2017 ntp
-rwxr-xr-x 1 root root 1191 Nov 22  2016 procps
-rwxr-xr-x 1 root root 1832 Jul 10 17:36 redis-server
-rwxr-xr-x 1 root root 4355 Jul 10  2014 rsync
-rwxr-xr-x 1 root root 2868 Jan 18  2017 rsyslog
-rwxr-xr-x 1 root root 1222 Apr  2  2017 screen-cleanup
-rwxr-xr-x 1 root root 4033 Mar 30  2017 ssh
-rwxr-xr-x 1 root root  604 Feb 12  2017 stop-bootlogd
-rwxr-xr-x 1 root root 1180 Feb 12  2017 stop-bootlogd-single
-rwxr-xr-x 1 root root  731 Jun  5  2017 sudo
-rwxr-xr-x 1 root root 1597 May 25  2017 sysstat
-rwxr-xr-x 1 root root 1391 May  6  2017 unattended-upgrades
-rwxr-xr-x 1 root root 1306 Mar 22  2017 uuidd
yht@scw-adac3b:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Debian
Description:	Debian GNU/Linux 9.9 (stretch)
Release:	9.9
Codename:	stretch
yht@scw-adac3b:~$ sudo /etc/init.d/irgsh-chief start
[ ok ] Starting irgsh-chief (via systemctl): irgsh-chief.service.
yht@scw-adac3b:~$ sudo /etc/init.d/irgsh-builder start
[ ok ] Starting irgsh-builder (via systemctl): irgsh-builder.service.
yht@scw-adac3b:~$ sudo /etc/init.d/irgsh-repo start
[ ok ] Starting irgsh-repo (via systemctl): irgsh-repo.service.