Member-only story
How I Use aide to Detect Unauthorized Changes on My Linux and Ubuntu Servers
--
Share
Intro: One of the biggest risks on any Linux system is a silent change — a backdoor quietly added, a config file altered, or a binary replaced. That’s why every server I deploy today includes one essential tool: AIDE (Advanced Intrusion Detection Environment). It’s like Tripwire, but free, fast, and simple to configure.
In this blog, I’ll walk you through exactly how I use AIDE to detect unauthorized changes — before they become real threats.
1. Why File Integrity Monitoring Matters
Attackers often leave behind tiny traces:
- A modified binary like /bin/ls or sshd
- A new cron job
- A script dropped into /tmp, /var/tmp, or /dev/shm
These changes usually don’t cause alerts unless you’re actively monitoring them. That’s where AIDE comes in.
2. Installing AIDE
# Ubuntusudo apt updatesudo apt install aide
# Red Hat / CentOS / AlmaLinuxsudo yum install aide
3. Initialize the AIDE Database
After install, run:
sudo aideinit
Free Linux Security Audit Tool
If you're checking a Linux server for suspicious activity, it's also worth reviewing SSH settings, user access, listening services, and firewall configuration.
I built a free Linux Security Audit Tool to make some of those checks easier. It runs locally and generates reports you can review afterward.
NextGenAlert Linux Security Audit — Free Community Edition
Top comments (0)