Which of the following commands will change all CR-LF pairs in an imported text file, userlist.txt, to Linux standard LF characters and store it as newlist.txt?

What is the output when the following shell script executes?

Cat <<foobar
Hello foobar
foobar

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Consider the following output:
prompt> myapp
[1]+ Stopped myapp
This output was the result of the user pressing the keyboard combination of the Ctrl key and what
letter key? Enter only the single (1) letter as your answer

What command line redirection characters instruct the shell to read from the current input source until a specific word, on a separate line and without and trailing
spaces, is reached?

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What command with all options and/or parameter will send the signal USR1 to any executing process of program apache2?

The system bell sound is annoying you. Which of the following can you use to change this and other user X preferences?

Users may create and edit a configuration file in their home directory that can tell the X window system what window manager they wish it to start when they log in.
What file is that?

What key combination is used to forcibly halt the X server in the event of the graphical session becoming unusable (e.g., desktop manager or full screen application
hanging)?

You are looking for an executable file foo. Select the command that would search for foo within directories set in the shell variable, PATH.

How can you turn off the group quota in /pub?