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Installing and Configuring AIDE

In this lab, we will install the Advanced Intrusion Detection Environment (AIDE) and configure it to monitor directories and applications for changes. We will also set up a cron job to run a daily check using AIDE. *This course is not approved or sponsored by Red Hat.*

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Lab Info
Level
Intermediate
Last updated
Aug 26, 2025
Duration
30m

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Table of Contents
  1. Challenge

    Install and configure AIDE
    1. Install AIDE:

      yum install -y aide
      
    2. Initialize AIDE:

      /usr/sbin/aide --init
      
    3. Copy initialized database to production:

      cp /var/lib/aide/aide.db.new.gz /var/lib/aide/aide.db.gz
      
  2. Challenge

    Configure AIDE to run every day at 1 AM
    1. Create a cronjob to run aide --check at 1 AM daily:

      nano /etc/crontab
      
      0 1 * * * /usr/sbin/aide --check 
      
  3. Challenge

    Define directories and applications to monitor
    1. Define directories to monitor:

      nano /etc/aide.conf
      
      /patient-data    DIR
      /accounting     DIR
      
    2. Add an application to monitor each time it's accessed:

      nano /etc/aide.conf
      
      APP_ACCESS = a
      /applications/payroll   APP_ACCESS
      
  4. Challenge

    Update the AIDE database with new directory and application statuses
    1. Update the AIDE database (because we made changes to the /etc/aide.conf file):

      /usr/sbin/aide --update
      
      cp /var/lib/aide/aide.db.new.gz /var/lib/aide/aide.db.gz
      
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