Обсуждение: Postgres Pain Points #3 postgres role
Relatively minor. All docs say to use "su - postgres" - it doesn't seem to work right with linux. The difference in using the OS user postgres and the postgres user (role) postgres is confusing. Even if we set the postgres password to "postgres", it doesn't accept the password. With linux we have found that "sudo -u postgres psql" works. But not sure this is right or the best way. -- Support Dept Tiger Nassau, Inc. www.tigernassau.com 406-624-9310
On 08/11/2016 10:15 AM, support-tiger wrote: > Relatively minor. All docs say to use "su - postgres" - it doesn't You talking about this?: https://www.postgresql.org/docs/9.5/static/install-short.html That is building from source and shows creating an OS postgres user. The only other thing I have seen is this: https://help.ubuntu.com/community/PostgreSQL and it shows: sudo -u postgres psql postgres > seem to work right with linux. The difference in using the OS user > postgres and the postgres user (role) postgres is confusing. Even if we > set the postgres password to "postgres", it doesn't accept the > password. With linux we have found that "sudo -u postgres psql" works. > But not sure this is right or the best way. > > -- Adrian Klaver adrian.klaver@aklaver.com
The only other thing I have seen is this:
https://help.ubuntu.com/community/PostgreSQL
and it shows:
sudo -u postgres psql postgres
The second postgres redundant - the default database to connect to is the name of the connecting user.
The relates back to your pg_hba.conf concern.
The default pg_hba.conf allows for the postgres user on the system to connect, via the postgres user in the cluster, to the postgres database that is created by default, using a UNIX socket. Among other possibilities "sudo -u postgres" accomplishes the "for the postgres user on the system" portion of the above. The rest of it is handled by defaults within the psql application.
At this point you can connect as a superuser and setup whatever else you require. This is the way Ubuntu means for PostgreSQL to be configured initially - via the postgres O/S user on a local UNIX socket.
David J.