Which command would you use to display a variable's value?

The command used to display a variable's value in Linux is echo. This command is specifically designed for the purpose of outputting text and variable values to the terminal. When you use echo, you can reference a variable by preceding its name with a dollar sign (e.g., echo $VARIABLE_NAME), which tells the shell to expand the variable and display its value.

The other options are not typically used for displaying variables. The print command is not a standard Linux shell command but is often seen in other programming languages or specific contexts. The show command does not exist as a native command in Linux for displaying variable values. The cat command is primarily used to concatenate and display the contents of files rather than output variable values. Therefore, echo stands out as the correct option for displaying a variable's value in a Linux environment.