# Add a Logon Warning Notification to Linux

1. Log into the Linux device
2. Run the following command in a terminal
   # create the logon notification text
   sudo nano /etc/logon-warning.txt
3. Enter the text to be displayed during logon, below is an example

       ******************************* WARNING *******************************
       *                                                                     *
       * This system is intended for use by authorized users only.           *
       * Unauthorized or improper use of this system is strictly prohibited. *
       *                                                                     *
       ***********************************************************************

4. Press CTRL+O, Enter, CTRL+X to write the changes
5. Continue with the following command in terminal
   # edit ssh config file
   sudo nano /etc/ssh/sshd_config
6. Press CTRL+W and search for Banner
7. Uncomment the Banner line by removing the #
8. Enter the path to the logon-warning.txt file as the value

   Banner /etc/logon-warning.txt

9. Press CTRL+O, Enter, CTRL+X to write the changes
10. Continue with the following command in terminal
    # restart the ssh server
    sudo systemctl restart ssh*
11. That's it, try connecting to a new session and the logon warning message should be displayed