How to Update CentOS Linux

Introduction

It is a best practice to update your server on a regular schedule for security and stability. Use this guide to keep your CentOS server updated.

Supported Versions

This guide applies to the following versions, both with and without SELinux enabled.

• CentOS 8
• CentOS 7
• CentOS 6

Make a Backup

Always make a backup before updating your system.

1. Update the Package Database

Use yum check-update to update the package database from the enabled repositories.

$ sudo yum check-update

2. Upgrade Packages

Use yum update to upgrade the packages.

$ sudo yum update

3. Restart the Server

$ sudo reboot

Conclusion

Periodic updates keep your server secure and stable. Make sure you have a snapshot or backup strategy in place before updating.