Step by Step to Install Chkrootkit Security Scanner on Ubuntu 20.04 LTS

Chkrootkit is a free & open source security scanner. It helps to detect rootkit on system. We can scan the server & check all the vulnerabilities present on the system. It is Unix-based program.

There are few steps to install Chkrootkit on ubuntu:

Step 1: Update the system.

apt-get update

Step 2: Install Chkrootkit.

apt-get install chkrootkit

• Check the Chkrootkit version.

chkrootkit -V

• Here is the command output.

Step 3: Chkrootkit syntax & commands.

• List the available Chkrootkit commands:

chkrootkit -h

• Here is the command output.

• List all available test.

chkrootkit -l

• Here is the command output.

• Run the following command to scan the server.

chkrootkit

• Here is the command output.

• Run the following command to display only infected output message.

chkrootkit -q

• Here is the command output.

• Check all files with specific directory.

chkrootkit -r /opt

Step 4: Create a bash script for scanning server & send scan details report to mail address.

vim /etc/cron.daily/chkrootkit.sh

• Add the following lines:

#!/bin/sh
(
chkrootkit
) | /bin/mail -s 'CHROOTKIT Daily Run (Server-Name)' [email protected]

• To enable the daily Schedule check.

vim /etc/chkrootkit.conf

• Edit the following lines:

RUN_DAILY="true"

• Here is the command output.