You can install a new program on Linux in the following ways: through the Ubuntu Software Center or the Synaptic Package Manager. However, some programs have to be installed using more sophisticated methods, such as through the terminal. In this article, you will walk through the step-by-step process of installing software using the file
INSTALL.sh
… The article will show you how to install the Rockhopper VPN client as an example.
Steps

Step 1. Download the program you want to install
Installation files are usually compressed into a Tar or zip archive.

Step 2. Extract the contents of the archive to your desktop

Step 3. Open a terminal using the keyboard shortcut Ctrl + Alt + T
Enter the following command: cd ~ / Deskop / rockhopper-0.2.b1-020. Replace rockhopper-0.2.b1-020 with your desktop folder name. Press ↵ Enter.

Step 4. Make the file
.sh
executable.
To make the file executable, enter the following command in the terminal: chmod + x install.sh. Replace install.sh with the name of the.sh file. Press ↵ Enter.

Step 5. Run the file
.sh
.
Enter this command: sudo./install.sh. Replace install.sh with the name of the.sh file again. Press ↵ Enter Note: If that doesn't work, try sudo bash install.sh without the "./" (this worked on Ubuntu 16). To do this, you will have to enter your administrator password.

Step 6. Complete the installation of the application
Installing through the terminal can include additional steps, such as verifying the installation.