PostgreSQL: Check if server is running

Check if PostgreSQL server is running in openSUSE 12.2, 12.3 etc. and possibly other systemd-based distributions:

1. # systemctl status postgresql.service

2. # netstat -na | grep 5432

3. # ps ax | grep postgres

4. # pgrep -l | grep postgres

If all of these look OK, then the server is probably running.