PostgreSQL is a popular database option used teams and companies of all sizes. From the smallest of hobbyist projects, to the largest of Enterprise online web applications.
In this tutorial, I’m going to explain how to install the latest Postgresql on the Raspberry Pi. I’m going to assume that you have Raspbian installed on your Raspberry Pi.
Installing the Essentials
In an open Terminal session window, type the following command to install PostgreSQL:
sudo apt update sudo apt install postgresql
Wait until the installation process is finished. Part of the installation process will involve the setup of PostgreSQL as a system service. Once the installation has finished, you can verify it’s running via:
sudo systemctl status postgresql
You should see something like this:
pi@raspberrypi:~ $ sudo systemctl status postgresql ● postgresql.service - PostgreSQL RDBMS Loaded: loaded (/lib/systemd/system/postgresql.service; enabled; vendor prese Active: active (exited) since Sat 2019-09-21 15:53:47 MDT; 38min ago Process: 4031 ExecStart=/bin/true (code=exited, status=0/SUCCESS) Main PID: 4031 (code=exited, status=0/SUCCESS) CPU: 0 CGroup: /system.slice/postgresql.service Sep 03 15:53:47 raspberrypi systemd: Starting PostgreSQL RDBMS... Sep 03 15:53:47 raspberrypi systemd: Started PostgreSQL RDBMS.
It is really that simple; PostgreSQL has been installed!
Connect to the PostgreSQL console
In an open Terminal session window, use this command to connect to PostgreSQL the running console.
sudo -i -u postgres
Still connected to the console, you can run
psql to help verify what version you’re working with:
postgres@raspberrypi:~$ psql psql (11.5 (Raspbian 11.5-1+deb10u1)) Type "help" for help. postgres=#
You can display a list of all the current databases.
Since we haven’t added one, you should see a list of 3 databases.
quit the console, just type
Enable Networking for PostgreSQL
In most cases, your PostgreSQL database will be accessed through a web application server running on the same machine - such as through PHP, Node, Ruby on Rails, etc. In which case, you don’t have to do any further PostgreSQL configuration.
To allow your PostgreSQL databases to be accessed from the network via TCP/IP, you’ll need to make a simple change
to a configuration file. Open the following file with
Find the following line:
listen_addresses = 'localhost'
Update it to:
Close and save the file with
ctrl+x. Finally, restart the running PostgreSQL service.
sudo systemctl restart postgresql
Hopefully this was a simple walkthrough to show you how to setup the latest version of the Ruby on Rails web development framework on the Raspberry Pi. Rails is a very popular framework, so it’s great to also have that option on the Raspberry Pi!