Below are the required steps to enable the SSH Notification email at the server side:
1. Login to the shell prompt of your server
2. Edit the fine “/root/.bashrc” using any editor like vi
3. Add the below contentts to end of /root/.bashrc
echo ‘ALERT – Root shell Access on:” `date` `who` |mail -s “Alert: Root shell access from `who | cut -d”(” -f2 | cut -d”)” -f1`” email@example.com
4. Please make sure to restart the sshd service with the help of below command once its done:
service sshd restart
Note: DO replace “firstname.lastname@example.org” with the notification address.