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Asked: 2024-09-27T06:10:39+05:30 In: ,

how to install postgresql in linux

I’m trying to install PostgreSQL on my Linux machine, but I’m running into some difficulties. I’ve done a bit of research, but I’m still not entirely sure about the best approach. I’m using Ubuntu 20.04, and I want to install the latest version of PostgreSQL. I’ve heard there are different methods available, like using the terminal or downloading from the official PostgreSQL website, but I’m not comfortable with either method yet.

When I tried using the terminal, I found some instructions online that involved adding a repository and using `apt-get`, but I wasn’t sure if I needed to do anything special before starting that process. I also came across some mentions of configuring the database after the installation, which sounds a bit daunting to me since I’m not very familiar with command-line interfaces.

Could anyone please provide a step-by-step guide on how to properly install PostgreSQL on my Linux system? Additionally, any tips on how to set it up afterward would be really helpful. I’m keen on getting this right, so I appreciate any detailed advice!

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    2 Answers

    1. Installing PostgreSQL on Linux for Beginners

      So, you want to install PostgreSQL on your Linux machine? No stress, I got your back! It’s pretty straightforward. Here’s how to do it, step by step.

      Step 1: Open Your Terminal

      First things first, you need to open the Terminal. You can usually find it in your applications. Just look for an icon that looks like a black box or something similar.

      Step 2: Update Your System

      Before installing anything, it’s a good idea to make sure your system is all up-to-date. You can do this by typing the following command:

      sudo apt update

      Then hit Enter! You might need to enter your password. Just type it in and press Enter again.

      Step 3: Install PostgreSQL

      Now, you’re ready to install PostgreSQL. Type this command:

      sudo apt install postgresql postgresql-contrib

      This will install PostgreSQL along with some extra stuff that’s helpful. Again, hit Enter and wait for it to finish.

      Step 4: Check if it’s Running

      After the installation, you want to check if everything is running smoothly. Use this command:

      sudo systemctl status postgresql

      If you see “active (running),” then you’re good! If it’s not running, just start it with:

      sudo systemctl start postgresql

      Step 5: Access PostgreSQL

      To use PostgreSQL, you need to switch to the PostgreSQL user. Type:

      sudo -i -u postgres

      Now you’re the PostgreSQL user! You can start the PostgreSQL command line by typing:

      psql

      You should see a prompt that looks something like this: postgres=#. That means you’re in!

      Final Note

      There you go! You’ve got PostgreSQL installed on your Linux machine. If you want to get fancy, you can look up how to create databases and users later. For now, just play around and have fun!


    2. To install PostgreSQL on a Linux system, the process may vary depending on the distribution you’re using. For Debian-based systems (like Ubuntu), you would begin by ensuring that your package lists are up-to-date. Open a terminal and execute `sudo apt update`. Once updated, install PostgreSQL along with the necessary client tools by running `sudo apt install postgresql postgresql-contrib`. This will install the database server along with additional utilities that enhance its functionality. After installation, PostgreSQL runs as a service by default, and you can check its status with `sudo systemctl status postgresql`.

      For Red Hat-based systems (like CentOS or Fedora), the installation differs slightly. Begin by enabling the PostgreSQL repository with `sudo dnf module enable postgresql`, followed by a specific version number if necessary. After enabling the repository, use `sudo dnf install postgresql-server postgresql-contrib` to install the server and the additional tools. Once installed, you’ll need to run `sudo postgresql-setup initdb` to initialize the database cluster. Start the PostgreSQL service using `sudo systemctl start postgresql` and optionally enable it to start on boot with `sudo systemctl enable postgresql`. Access the database using the `psql` command-line interface by switching to the `postgres` user via `sudo -i -u postgres`.

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