Which of the following commands will reduce all consecutive spaces down to a single space? A. tr '\s' ' ' < a.txt > b.txt B. tr -c ' ' < a.txt > b.txt C. tr -d ' ' < a.txt > b.txt D...

When starting a program with the nice command without any additional parameters, which nice level is set for the resulting process? A. -10 B. 0 C. 10 D. 20

Which of the following sequences in the vi editor saves the opened document and exits the editor? (Choose TWO correct answers.) A. esc ZZ B. ctrl :w! C. esc zz D. esc :wq! E. ctrl XX

In the vi editor, which of the following commands will copy the current line into the vi buffer? A. c B. cc C. 1c D. yy E. 1y

Which of the following shell redirections will write standard output and standard error output to a file named filename? A. 2>&1 >filename B. >filename 2>&1 C. 1>&2>file...

Which shell command is used to continue background execution of a suspended command? A. & B. bg C. cont D. exec E. :&

Regarding the command: nice -5 /usr/bin/prog Which of the following statements is correct? A. /usr/bin/prog is executed with a nice level of -5. B. /usr/bin/prog is executed with a nice leve...

From a Bash shell, which of the following commands directly executes the instruction from the file /usr/local/bin/runme.sh without starting a subshell? (Please select TWO answers.) A. source /usr/loc...

Which of the following commands replaces each occurrence of 'bob' in the file letter with 'Bob' and writes the result to the file newletter? A. sed '/bob/Bob' letter > newletter B. sed s/bob/Bob/ ...

Which of the following commands is used to change options and positional parameters for a running Bash? A. history B. set C. bashconf D. setsh E. envsetup