Linux Essentials Chapter 9 Test Online 2016

The echo command:

A file begins with #!/bin/csh. This means:

Which are appropriate editors for writing shell scripts?. (choose two)

Most of nano’s commands take the form of:

What does this shell script do?. FOO=/tmp/foo. if [ ! –d $FOO ]; then. mkdir $FOO. fi

Which of the following are correct about for and while loops?. (choose two)

Given the following part of a script:. if [ -f $1 ]; then. echo “I am here”. fi

Given the following script that is run through ./test.sh hello goodbye. if [ -f $2 ]; then. echo “I am here”. fi

What is the correct way to assign the word “Hello” to a variable?

What is the correct way to save the current directory to a variable?

Which shell command accepts input from the user’s keyboard?

What information is held inside $? ?

How would you finish your script with an exit code of 42?

The if command looks for what exit code to consider a condition to be true?

The number of users logged in is in a variable called USERS. How would you test to see if 5 users are logged in?

Given the following script:. while [ ! –f /tmp/foo ]; do. echo –n “.”. process_data > /tmp/foo. done. Which of the following are true?. (choose two)

A conditional that lets you make multiple comparisons with a pattern is called:

What is the meaning of $(( $i + 1)) ?

How would you write a test that says “if /tmp/foo is a directory or USERS is greater than 5”?