A junior Linux administrator is optimizing a system in which an application needs to take priority 0 when running the process. The administrator runs the ps command and receives the following output:

Given this scenario, which of the following steps will address this issue?

A Linux administrator needs to know the MAC address of the server's gateway.
Which of the following commands should the administrator run to obtain this information?

A junior systems administrator has generated a PKI certificate for SSH sessions. The administrator would like to configure authentication without passwords to remote systems. Which of the following should the administrator perform?

A technician recently installed Linux on a desktop computer. The desktop has two graphics cards from two different vendors. One of the graphics cards works, but the other does not. Which of the following commands should the technician use to start troubleshooting this issue?

Ann, a Linux administrator, wants to edit a configuration management file. When she opens the file to edit, her text editor reports that the file has been opened in read-only mode. She then tries to edit the file as root by elevating via sudo and is still unable to save any changes. The error message in her text editor says that the read-only option is set on the file. Ann checks the permissions on the file and sees the following:
-rw-rw-r-- 1 root wheel 30 Jun 13 15:38 infrastructure.yml
Which of the following commands is the BEST option to allow her to successfully modify the file?