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Asked: 2024-09-27T06:06:33+05:30 In: ,

how to install postgresql on ubuntu

I’m trying to set up PostgreSQL on my Ubuntu machine, but I’m running into some issues. I’ve read through several guides online, but I’m still feeling confused about the installation process. First off, I’m not sure if I should be using the default package from Ubuntu’s repositories or downloading it straight from the PostgreSQL website. I’ve heard that the version in the repositories might not be the latest, but I’m hesitant about manually installing it because I’m worried about dependencies.

Once I decide on the version, I’m a bit lost on the command line commands. Do I need to add any special repositories first? What’s the best way to ensure that everything gets updated properly? I’ve also read that I need to set up the database cluster after installation, and I’m uncertain about how to do that or which configurations I should tweak for optimal performance.

Finally, can someone clarify how to install any necessary extensions or packages that come with PostgreSQL, especially if I’m planning to use it for a web application? Any guidance on these points would be greatly appreciated!

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    2 Answers


    1. To install PostgreSQL on Ubuntu, you should first ensure that your package list is up-to-date. Open a terminal and run the following command: sudo apt update. Once the package list is refreshed, you can easily install PostgreSQL by executing sudo apt install postgresql postgresql-contrib. This command installs both the PostgreSQL database server and a collection of additional utilities and extensions that enhance its functionality.

      After the installation completes, the PostgreSQL service should automatically start. You can verify this by checking the service status with sudo systemctl status postgresql. The default PostgreSQL installation creates a user named postgres. You can switch to this user with sudo -i -u postgres and access the PostgreSQL prompt by typing psql. To set up a new database, you can do so within the prompt, using commands like CREATE DATABASE yourdbname; and CREATE USER yourusername WITH PASSWORD 'yourpassword';. Don’t forget to adjust the authentication settings in /etc/postgresql/{version}/main/pg_hba.conf according to your project requirements.

    2. Installing PostgreSQL on Ubuntu – A Rookie’s Guide

      So, you want to get PostgreSQL up and running on your Ubuntu machine? Don’t worry, it’s not as scary as it sounds! Here’s a simple step-by-step guide just for you:

      Step 1: Open the Terminal

      First, you need to find the terminal. You can do this by pressing Ctrl + Alt + T. This is where all the magic will happen!

      Step 2: Update Your Package List

      Before installing anything, it’s a good idea to update your package list. Type in this command and hit Enter:

      sudo apt update

      It might ask for your password, just type it in (you won’t see anything while typing, that’s normal!)

      Step 3: Install PostgreSQL

      Now, let’s install PostgreSQL. Type this command and press Enter:

      sudo apt install postgresql postgresql-contrib

      It might take a little while to download and install everything. Just relax!

      Step 4: Check if PostgreSQL is Running

      After the installation is done, you can check if PostgreSQL is running by typing:

      sudo systemctl status postgresql

      If it’s running, you should see “active (exited)” somewhere in the output.

      Step 5: Access PostgreSQL

      Now, let’s access PostgreSQL. Type this command:

      sudo -i -u postgres

      After that, you can enter the Postgres command-line interface by typing:

      psql

      You should now see something that looks like postgres=#. Congrats, you are in!

      Step 6: Exit PostgreSQL

      When you’re done, just type:

      exit

      And then you can leave the postgres user by typing:

      exit

      Wrap Up

      And that’s it! You’ve just installed PostgreSQL on your Ubuntu machine. Remember, it’s okay to make mistakes, just keep trying! Good luck with your coding adventures!

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