This guide shows a simple way to know when someone logged in as root or normal user using [[Key-Based SSH Logins|Secure Shell (SSH)]]. It will send an email alert notification to the specified email address along with the IP address of last login.

'''NOTE:''' You must have configured your HDA to send emails. One way to do so is by following the [[Outgoing_mail_via_gmail|Outgoing mail via Gmail]] guidance.