On a CentOS or RedHat version 7.x host, the unit file is named edb-as-12.service
and resides in /usr/lib/systemd/system.
The unit file contains references to the location of the Advanced Server data
directory. You should avoid making any modifications directly to the unit file because it may be overwritten during package upgrades.
By default, data files reside under /var/lib/edb/as12/data
directory. To use a data
directory that resides in a non-default location, create a copy of the unit file under the /etc