PostgreSQL#

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> 0.0.0.0/0 md5
- example: hostssl <database> <user> 0.0.0.0/0 md5

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

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 <username> WITH PASSWORD '<password>'; - https://www.postgresql.org/docs/8.0/sql-createuser.html
CREATE DATABASE <db_name> OWNER <username>; - https://www.postgresql.org/docs/9.0/sql-createdatabase.html