Which command allows you to make a shell variable visible to subshells?

Which of the following commands shows ONLY the user id of Bob?

(Select TWO)

Which of the following is the best way to list all defined shell variables?

To test a shell script called myscript, the environment variable FOOBAR must be removed temporarily.

How can this be done?

We have bash script ~/myscript shown below:
shift echo $2
We call this script:
~/myscript alpha beta gamma delta
What will we see?

In the following command and its output

$ echo $$
12942

What is 12942?

What BASH environment variable will prevent you from overwriting a file with a ">" or ">>"?

You need to print 12 copies of the document foo.txt.

Which of the following commands would you use?

Rate this comment: The "root" account has no security restrictions imposed upon them

Which commands will set a regular users password so it forces them to change it every 60 days?

(Choose all that apply)