If you receive a message that says you don't have permission to run a program or access is denied, type sudo before the program name and press Enter.For example, you can launch a website in a web browser by typing the web browser name followed by the web address and press Enter to launch that website in the web browser (i.e. Many programs have additional command modifiers you can use to launch the program in a specific way.
Type -h or -help after the program name to display the help menu for that program.For example, if you want to run Firefox from the Terminal, you would simply type firefox and press Enter.As long as a program is in your user "$PATH" variable, Linux will search $PATH for the program and launch it automatically. Unlike the Windows command-line (CMD), you do not need to type out the full directory path or change directories for most programs in Linux. Type the name of the program and press ↵ Enter.
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