email when access the server

It’s always a good practice & from the security point of view to get notified instantly through an email when someone logs into your server through SSH with root privileges.
Open the file .bashrc for the root user.
Vi /root/.bashrc
enter the following code into

echo 'SSH Root Access (Your Server Name) on:' `date` `who` | mail -s "ALERT: Root Access from `who | cut -d"(" -f2 | cut -d")" -f1`" your@email-address.com

Note : Replace “Your Server Name” equal to your original server name and “your@email-address.com” equal to your oginal email address.
Now whenever someone successfully logs in to your server as root through SSH, an email will be automatically dispatched from the server to the mentioned mail address