Introduction Learn how to safely remove old kernels on CentOS , RHEL , and Fedora to free up space and improve system performance. Step-by-step guide with best practices for maintaining your Linux system. As you continue to update and upgrade your Linux system, particularly on distributions like CentOS, RHEL, and Fedora, old kernels can accumulate over time. While these kernels are essential for booting your system, having too many can clutter your boot menu and consume valuable disk space. This guide will walk you through the process of safely removing old kernels from your system without risking stability, ensuring that your Linux machine runs smoothly and efficiently. Why Should You Remove Old Kernels? The Problem with Accumulating Kernels Linux kernels are the core of the operating system, responsible for managing hardware and system processes. Every time you update your system, a new kernel may be installed, but the old ones aren't automatically removed. This can lead to seve...

Introduction In this tutorial, we will explore how to install and configure AIDE (Advanced Intrusion Detection Environment) on CentOS. AIDE is a powerful tool designed for monitoring changes to files on the system, helping you detect unauthorized access and modifications.  Ideal for system administrators and security professionals, this guide will provide step-by-step instructions to ensure a successful setup of AIDE on your CentOS system. By the end of this tutorial, you will have a robust intrusion detection system in place, capable of providing detailed reports about the integrity of your files and system security. What does Aide mean AIDE is one of the most popular tools for monitoring the server changes in a LINUX based system.  It call as Advanced Intrusion Detection Environment. Install AIDE on Centos $ sudo yum install aide Check AIDE Version on your system $ sudo aide -v Configure AIDE $ sudo cp /etc/aide.conf /etc/aide.conf_BK Add lines not check /tmp ...