Which of the following shell redirections will write standard output and standard error output to a file named filename?
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 prints a list of usernames (first column) and their primary group (fourth column) from the /etc/passwd file?
Which of the following signals is sent to a process when the key combination CTRL+C is pressed on the keyboard?