How to Install Shell In A Box
Shell In A Box is a web based terminal emulator created by Markus Gutschke. It has a built-in web server that runs as a web-based SSH client on a specified port and prompt you a web terminal emulator to access and control your Linux Server SSH Shell remotely using any AJAX/JavaScript and CSS enabled browsers.
Installation
sudo apt install shellinabox
sudo /etc/init.d/shellinabox start
Change Default Port (Optional)
sudo nano /etc/default/shellinabox
Find the line SHELLINABOX_PORT
and change this number to anything you like
Save and exit the text editor then run the following command to restart the service
sudo /etc/init.d/shellinabox restart