Login to your server as root and at the root prompt fire the below command:
root@xxx[~]vi /etc/cron.daily/chkrootkit.sh
Insert the following to the new file:
#!/bin/bash
cd /your_installpath/chkrootkit-0.42b/
./chkrootkit | mail -s “Daily chkrootkit from Servername” admin@youremail.com
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Note
1. Replace ‘your_installpath’ with the actual path to where you unpacked Chkrootkit.
2. Change ‘Servername’ to the server which you are running.
3. Change ‘admin@youremail.com’ to your actual email address where the script will mail you.
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Save the file.
Change the file permissions
root@xxx[~]chmod 755 /etc/cron.daily/chkrootkit.sh
Now if you like ,you can run a test report manually in SSH, to see how it looks.
root@xxx[~]cd /etc/cron.daily/
root@xxx[~]./chkrootkit.sh
You’ll now receive a alert with the report!
Everyday you should receive the alert.
You don’t have to run it manually.