Config Files

  • general config (Ubuntu): /etc/postgresql/10/main/postgresql.conf
  • general config (Archlinux): /var/lib/postgres/data/postgresql.conf
    • to allow access from everywhere: listen_addresses = '*'
  • who can access what from where and how (Ubuntu): /etc/postgresql/10/main/pg_hba.conf
  • who can access what from where and how: (archlinux)/var/lib/postgres/data/pg_hba.conf
    • example: host <database> <user> md5
    • example: hostssl <database> <user> md5

Commands (prompt)

  • change the user from root to postgres: su -l postgres
  • init the db: initdb --locale=en_US.UTF-8 -E UTF8 -D /var/lib/postgres/data
  • enter db tool psql: psql
  • create user: createuser --interactive
  • create database
    • createdb <db_name>
    • create and set owner: createdb <db_name> -O <role_name>
  • restart the db: systemctl restart postgresql.service

Commands (psql)

  • connect: psql -h <host_or_ip> -p <port> -d <database> -U <username>
  • set password: \password <role_name>
  • list user (roles): \du
  • list user (roles) with passwords to check if they are set: select * from pg_shadow;
  • list databases: \l
  • detele db: DROP DATABASE <db_name>;
  • delete role: DROP ROLE <role_name>;

Create User / Database

Last modified July 16, 2022: fix headlines in IT doc (9d350ef)