Which of the following commands prints a list of usernames (first column) and their primary group (fourth column) from the /etc/passwd file?

Which of the following commands will print the last 10 lines of a text file to the standard output?

Which character, added to the end of a command, runs that command in the background as a child process of the current shell?

Which of the following commands will reduce all consecutive spaces down to a single space?

When starting a program with the nice command without any additional parameters, which nice level is set for the resulting process?

Which of the following sequences in the vi editor saves the opened document and exits the editor? (Choose TWO correct answers.)

In the vi editor, which of the following commands will copy the current line into the vi buffer?

Which of the following shell redirections will write standard output and standard error output to a file named filename?

Which shell command is used to continue background execution of a suspended command?

Regarding the command:

nice -5 /usr/bin/prog
Which of the following statements is correct?