Class 18 Quiz

Question 1

What character would you use if you wanted to run two commands, one right after the other, on a single command line?

Answer 1

;

Question 2

What other two characters allow more than one command to be run on a single command line?

Answer 2

& and | (the pipe character)

Question 3

How can you continue a command onto the next line?

Answer 3

type \ immediately before hitting Enter

Question 4

What does the dirs command do?

Answer 4

prints the current directory stack

Question 5

If you wanted to go to the root directory, but wanted to get back to where you were easily, what would you enter at the command line?

Answer 5

pushd /

Question 6

If you used the command pushd, what would you type at the command line to get back to the previous directory?

Answer 6

popd

Question 7

What is special about a global variable?

Answer 7

you can use it in any subshell of the shell in which it was created.

Question 8

What are the limitations of a local variable?

Answer 8

you can only use it in the shell in which it was created

Question 9

What would you type at the command line to create the local variable foo and assign it the value “FOO”?

Answer 9

foo=FOO

Question 10

What would you type at the command line to create the global variable bar and assign it the value “BAR”?

Answer 10

export bar=BAR