SSH LOG-user login

https://askubuntu.com/questions/179889/how-do-i-set-up-an-email-alert-when-a-ssh-login-is-successful

 

Modify or create /etc/ssh/sshrc with the following contents:

ip=`echo $SSH_CONNECTION | cut -d " " -f 1`

logger -t ssh-wrapper $USER login from $ip
echo "User $USER just logged in from $ip" | sendemail -q -u "SSH Login" -f "Originator <from@address.com>" -t "Your Name <your.email@domain.com>" -s smtp.server.com &

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This will effectively notify you by email anytime someone logs in through SSH, and the login will be logged in the syslog.

Note: You'll need the sendemailpackage (sudo apt-get install sendemail) for the email notification to work.