How to have postgresql restart under centOS 7?

I found out that to have postgresql restart you need to specify the exact name for the PostgreSQL service, which you can find under the list of services, using systemctl (also see this post): systemctl list-units|grep postgresql postgresql-10.service loaded active running PostgreSQL 10 database server

Then you can use service:

  service postgresql-10.service reload

or

service postgresql-10.service restart
Alternatively, you can use the systemctl command:
/bin/systemctl reload postgresql-10.service

or

  /bin/systemctl restart postgresql-10.service