In this tutorial, we will show you how to install PostgreSQL on Linux Mint 20. For those of you who didn’t know, PostgreSQL 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.
This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘
sudo‘ to the commands to get root privileges. I will show you through the step-by-step installation of PostgreSQL on a Linux Mint 20 (Ulyana).
Install PostgreSQL on Linux Mint 20 Ulyana
Step 1. First, make sure that all your system packages are up-to-date by running the following
apt commands in the terminal.
sudo apt update sudo apt upgrade
Step 2. Installing PostgreSQL on Linux Mint.
Let’s install the Postgresql server using the following command:
sudo apt install postgresql
Wait until the installation process completes. By default, the PostgreSQL service is started automatically after the installation. You can confirm if it is running with the command:
sudo systemctl status postgresql
Step 3. PostgreSQL Roles and Databases.
Both user and group are presented as term roles in PostgreSQL for handling database access permissions.
Peer are different methods for authentication in PostgreSQL.
Ident the method mainly used on TCP/IP connection while
Trust the method used to connect without password using given criteria in
Step 4. Accessing the PostgreSQL command prompt.
Once installing the PostgreSQL database server, by default, it creates a user ‘
postgres’ with role ‘
postgres’. It also creates a system account with the same name ‘
postgres’. So to connect to the Postgres server, log in to your system as a user of Postgres and connect database:
su - postgres psql
Now you are logged in to the PostgreSQL database server. To check login info use the following command from the database command prompt:
To disconnect from the PostgreSQL database command prompt just type the below command and press enter. It will return you back to the Ubuntu command prompt:
Create a new user and database:
### For example, let us create a new user called “meilana” with password “ranty”, and database called “rantydb”. ### sudo -u postgres createuser -D -A -P ranty sudo -u postgres createdb -O ranty meilanadb
Congratulations! You have successfully installed PostgreSQL. Thanks for using this tutorial for installing the latest version of PostgreSQL on the Linux Mint system. For additional help or useful information, we recommend you check the official PostgreSQL website.