An administrator is logged into a server remotely and wants to determine if the system is a VM. Which of the following commands would assist with this?

A junior systems administrator created a new filesystem /dev/sda1 with mountpoint /data and added it to the /etc/fstab for auto-mounting.
When the systems administrator tries to mount the file system, the system refuses. Given the output below:

Which of the following steps is necessary?

An engineer is working on a production application deployment that requires changing a web application property file called server.property that is managed by the Git version control system. A cloned copy of the remote repository in which the server.property file exists is on the local desktop computer. The engineer makes appropriate changes to the files, saves it as server.property, and executes git commit -m "changed the property file" server.property. Which of the following commands did the engineer fail to perform?

A Linux administrator tries to ping a hostname in a network but receives the message: hostname not found. The administrator is sure the name exists on the network and wants to verify if the DNS server is correctly configured on the client. Which of the following files should the administrator use to verify this information?

A junior systems administrator is tasked with providing the network_administrators group the ability to perform sudo without prompting for a password. Which of the following steps should the administrator perform to accomplish this task? (Choose two.)