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Install PostgreSQL on Ubuntu 20.04 - Step by step guide ?

This article covers how to install PostgreSQL on your Ubuntu 20.04 LTS machine. In fact, PostgreSQL, or Postgres, is a relational database management system that provides an implementation of the SQL querying language. It's standards-compliant and has many advanced features like reliable transactions and concurrency without read locks.


Service commands for PostgreSQL

The PostgreSQL database server runs as a service under the name "postgresql". You can manage the service by running the commands below.

1. Stop PostgreSQL server:

$ sudo systemctl stop postgresql

2. Start PostgreSQL server:

$ sudo systemctl start postgresql

3. Restart PostgreSQL(e.g. after changing configuration settings) server:

$ sudo systemctl restart postgresql

4. Reload PostgreSQL server:

$ sudo systemctl reload postgresql

5. Check PostgreSQL status:

$ sudo systemctl status postgresql

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