MultipleChoice
Which of the following commands kills the process with the PID 123 but allows the process to "clean up" before exiting?
OptionsMultipleChoice
What does the + symbol mean in the following grep regular expression:
grep '^d[aei]\+d$' /usr/share/dict/words
OptionsMultipleChoice
Which of the following commands changes all occurrences of the word ''bob'' in file data to ''Bob'' and prints the result to standard output?
OptionsMultipleChoice
What output will be displayed when the user fred executes the following command?
echo 'fred $USER'
Options