Setting up postgres on Ubuntu 20.04 [Quickstart]

PostgreSQL is a powerful, open-source relational database management system (RDBMS) that is widely used by developers and enterprises worldwide. It provides features such as data integrity, concurrency control, and scalability, making it a popular choice for building data-driven applications.

In this blog post, we will go through the steps to install PostgreSQL on Ubuntu 20.04 with all the necessary command examples.

Step 1: Update the Ubuntu package index #

Before installing PostgreSQL, make sure that your Ubuntu package index is up-to-date. You can do this by running the following command in your terminal:

sudo apt update

Step 2: Install PostgreSQL #

Once the package index is up-to-date, you can install PostgreSQL by running the following command:

sudo apt install postgresql postgresql-contrib

Ensure that the service is started:

sudo systemctl start postgresql.service

This command will install the PostgreSQL server and all the necessary dependencies.

Step 3: Verify the installation #

After installing PostgreSQL, you can verify the installation by checking the version number. You can do this by running the following command:

psql --version

This command should return the version number of PostgreSQL installed on your system.

Step 4: Create a new PostgreSQL user and database #

By default, PostgreSQL is installed with a single user called “postgres”. It is recommended to create a new user and database for your application. You can do this by following the steps below:

Log in to the PostgreSQL server with the following command:

sudo -u postgres psql

Create a new user with the following command:

CREATE USER myuser WITH PASSWORD 'mypassword';

Replace “myuser” and “mypassword” with your desired username and password.

Create a new database with the following command:

CREATE DATABASE mydatabase;

Replace “mydatabase” with your desired database name.

Grant all privileges to the new user with the following command:

GRANT ALL PRIVILEGES ON DATABASE mydatabase TO myuser;

Step 5: Connect to PostgreSQL #

Once you have created a new user and database, you can connect to PostgreSQL using the following command:

psql -h localhost -d mydatabase -U myuser

Replace “mydatabase” and “myuser” with your desired database name and username.

Conclusion #

In this blog post, we have gone through the steps to install PostgreSQL on Ubuntu 20.04 with all the necessary command examples. By following these steps, you should be able to install and configure PostgreSQL for your application. PostgreSQL is a powerful database management system that can help you build robust and scalable applications.