How To Install postgresql on Ubuntu 20.04
Introduction
In this tutorial we learn how to install postgresql on Ubuntu 20.04.
What is postgresql
postgresql is:
This metapackage always depends on the currently supported PostgreSQL database server version.
PostgreSQL is a fully featured object-relational database management system. It supports a large part of the SQL standard and is designed to be extensible by users in many aspects. Some of the features are: ACID transactions, foreign keys, views, sequences, subqueries, triggers, user-defined types and functions, outer joins, multiversion concurrency control. Graphical user interfaces and bindings for many programming languages are available as well. Task: postgresql-server
Package: postgresql Architecture: all Version: 12+214 Priority: optional Section: database Source: postgresql-common (214) Origin: Ubuntu Maintainer: Ubuntu Developers [email protected] Original-Maintainer: Debian PostgreSQL Maintainers [email protected] Bugs: https://bugs.launchpad.net/ubuntu/+filebug Installed-Size: 66 Depends: postgresql-12 Suggests: postgresql-doc Filename: pool/main/p/postgresql-common/postgresql_12+214_all.deb Size: 4004 MD5sum: 4a7e3f24b175497508026dee4039274f SHA1: 5bfbc6c7dbe4cba091a4b0901355ad68ca25e69e SHA256: 7e9419964a22dc062fd4a66d9f5baedd455eb908ddff575085d48daaeb54e586 Description-en: object-relational SQL database (supported version) This metapackage always depends on the currently supported PostgreSQL database server version.
PostgreSQL is a fully featured object-relational database management system. It supports a large part of the SQL standard and is designed to be extensible by users in many aspects. Some of the features are: ACID transactions, foreign keys, views, sequences, subqueries, triggers, user-defined types and functions, outer joins, multiversion concurrency control. Graphical user interfaces and bindings for many programming languages are available as well. Task: postgresql-server
There are three methods to install postgresql on Ubuntu 20.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install postgresql Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install postgresql using apt-get by running the following command:
sudo apt-get -y install postgresql
Install postgresql Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install postgresql using apt by running the following command:
sudo apt -y install postgresql
Install postgresql Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install postgresql using aptitude by running the following command:
sudo aptitude -y install postgresql
How To Uninstall postgresql on Ubuntu 20.04
To uninstall only the postgresql package we can use the following command:
sudo apt-get remove postgresql
Uninstall postgresql And Its Dependencies
To uninstall postgresql and its dependencies that are no longer needed by Ubuntu 20.04, we can use the command below:
sudo apt-get -y autoremove postgresql
Remove postgresql Configurations and Data
To remove postgresql configuration and data from Ubuntu 20.04 we can use the following command:
sudo apt-get -y purge postgresql
Remove postgresql configuration, data, and all of its dependencies
We can use the following command to remove postgresql configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge postgresql
References
Summary
In this tutorial we learn how to install postgresql package on Ubuntu 20.04 using different package management tools: apt, apt-get and aptitude.
