Want to be notified instantly when someone logs into your server as root? No problem, check out this nice tutorial on email notification for root logins. Keeping track of who logs into your server and when is very important, especially when you're dealing with the super user account. We recommend that you use an email address not hosted on the server your sending the alert from.
So lets get started!
1. Login to your server and su to root, I know the irony!
2. cd /root
3. pico .bashrc
4. Scroll to the end of the file then add the following:
For root user:
echo 'ALERT - Root Shell Access (' `hostname` ') on:' `date` `who` | mail -s "Alert: Root Access from `who | cut -d"(" -f2 | cut -d")" -f1`" root
echo 'ALERT - Root Shell Access (' `hostname` ') on:' `date` `who` >> /var/log/rootlogins
echo 'ALERT - Root Shell Access (YourserverName) on:' `date` `who` | mail -s "Alert: Root Access from `who | cut -d"(" -f2 | cut -d")" -f1`" firstname.lastname@example.org
Replace YourServerName with the handle for your actual server
Replace email@example.com with your actual email address
5. Crtl + X then Y
Now logout of SSH, close the connection and log back in! You should receive an email address of the root login alert a few minutes afterwards.
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