Pearson 102-400 New Attempt

Which of the following crontab entries will execute myscript at 30 minutes past every hour on Sundays?

Which of the following commands should be added to /etc/bash_profile in order to change the language of messages for an internationalized program to Portuguese (pt)?

Which command, depending on its options, can display the open network connections, the routing tables, as well as network interface statistics. (Specify ONLY the command without any path or parameters.)

Which of the following keywords can be used in the file /etc/resolv.conf? (Choose TWO correct answers.)