If you encounter “Unit not found” error when trying to start a service (CentOS/RHEL) most probably your service may need to be enabled:
For example:
[root@mesos-master ~]# systemctl start <name>
Failed to start <name>.service: Unit not found.
To resolve the issue:
[root@mesos-master ~]# systemctl enable <name>
[root@mesos-master ~]# systemctl start <name>
[root@mesos-master ~]#