Dear Alexey,
PostgreSQL 9.6.1-4.1C (RPM for x32 Linux) does have a startup script.
Be sure that after you install the RPM packages of PostgreSQL, you run the following commands to initialize PostgreSQL and register it as a service:
/usr/pgsql-9.6/bin/postgresql96-setup initdb
systemctl enable postgresql-9.6
Alternatively, you can get the same result by running the following command:
/usr/pgsql-9.6/bin/postgresql96-setup initdb postgresql-9.6
Best regards,
Vladimir Gurov