Question 15: When you execute a command at the shell prompt, the shell first looks in the current working directory for the command's executable file, then searches through the directories listed in the path variable for the executable file to run. Question 16 When typing a command, the correct syntax is to type the command name followed by a space, then any desired __ followed by a space, then any necessary - Question 17 In Linux, a __is used to accept input from the user and pass the input to the kernel for processing. Question 18 Which one of the following is the Shell Metacharacter used for "Command Termination" (to indicate one command has ended and something else follows it on the command line)? Question 19 Which one of the following is the Shell Metacharacter that causes the echo command to display the content in a variable's memory location instead of just displaying the variable name? Question 20: Which Linux command gets you out of your current shell Question 21 You have the myscript executable file. It is found in the current directory, but not in the command path. What would you enter at the command prompt that starts myscript and replaces the shell with the myscript process