Final answer:
To open an application from the terminal window, navigate to the application's directory using the 'cd' command and type the name of the executable file. Use the 'ls' command to list files and find the appropriate executable file if needed.
Step-by-step explanation:
To open an application from the terminal window, you need to enter the name of the application's executable file. First, open the terminal window on your computer. Then, navigate to the directory where the application is located using the 'cd' command. Finally, type the name of the executable file and press Enter.
For example, if you want to open the Firefox web browser from the terminal, you would type 'firefox' and press Enter. If the application is not in the system's PATH, you might need to provide the full path to the executable file.
Note that some applications might have a different name for the executable file than the application's name that you see in the GUI. You can use the 'ls' command to list the files in the directory and look for the appropriate file.