How to Update CentOS: A Beginner's Guide

Welcome to this comprehensive guide on updating your CentOS system. Whether you're new to CentOS or looking to refresh your knowledge, this guide aims to help you navigate the update process smoothly. Let's dive in!

Preparing Your System

Before initiating any updates, it's crucial to prepare your system. This preparation ensures that your update process goes as smoothly as possible without any hitches.

  • Start by backing up your important files. While updates are generally safe, having a backup is a wise precaution.
  • Next, you'll want to check your system for any existing software updates. You can do this by running the sudo dnf check-update command in the terminal. This command helps identify all the packages that have available updates.
  • Ensure your system is connected to a stable internet connection. Updates can sometimes be sizeable and require a reliable connection.

Executing the Update

Once your system is prepared, you're ready to proceed with the update. Here's how to do it step by step.

  1. Open your terminal.
  2. Type sudo dnf update and press Enter. You might be prompted to enter your password. This command will update all your system packages to their latest versions.
  3. If you want to update a specific package, use sudo dnf update package_name, replacing package_name with the name of the package you wish to update.
  4. Follow the on-screen instructions. The system may ask for your confirmation to download and install updates. Type 'y' and press Enter to proceed.
  5. Wait for the updates to complete. The time it takes can vary depending on the number and size of updates.

Remember, keeping your system updated is crucial for security and performance.

Post-Update Recommendations

After updating your system, there are a few recommendations to follow:

  • Reboot your system. This ensures that all updates are correctly applied, and new versions of software are in use.
  • Check for any errors during the update process. You can do this by reviewing the update logs. Any issues should be addressed promptly to ensure system stability.
  • Regularly check for updates. Keeping your system up-to-date is vital for security and accessing the latest features and improvements.


Updating CentOS is a straightforward process, but it's essential to follow these steps carefully to ensure a smooth and successful update. Regular updates keep your system secure and efficient. If you encounter any issues, don't hesitate to seek help from the CentOS community or professional support.