🛡️Install chkrootkit

Use this guide to install and schedule regular rootkit checks on your Linux server.

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Step 1: Install chkrootkit

Login to your server via SSH and run:

yum install chkrootkit -y

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Step 2: Create Monthly Cron Script

Create a new monthly cron job file:

nano /etc/cron.monthly/chkrootkit.sh

Paste the following contents:

#!/bin/bash
(cd /usr/lib/chkrootkit-0.49/; ./chkrootkit 2>&1 -q | mail -s "chkrootkit (Corp)" name@yourdomain.com)

Replace name@yourdomain.com with your actual email address to receive alerts.

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Step 3: Make the Script Executable

Save and exit the editor (CTRL+X, press Y, then Enter), then run:

chmod +x /etc/cron.monthly/chkrootkit.sh

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Notes

• The default installation path (/usr/lib/chkrootkit-0.49/) may vary. To confirm the path, run: rpm -ql chkrootkit and adjust the script accordingly if needed (e.g., use /usr/lib/chkrootkit/).
• Ensure the server has mailx or similar installed to send emails: yum install mailx -y

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Let me know if you want a version for Debian/Ubuntu or a daily cron job instead.