An administrator needs to change the DNS domain search order of a single Linux host to localize it better.
Which of the following files should the administrator edit?

Which of the following is commonly implemented in external devices to provide unique event-based two-factor authentication credentials when a system is already implementing username and password authentication?

A systems administrator needs to retrieve specific fields from a csv file. Which of the following tools would accomplish this task?

An administrator notices the HISTSIZE variable is 50, using the commands below:
HISTSIZE=50
export HISTSIZE
The administrator rechecks the HISTSIZE value using echo HISTSIZE but gets no value. Which of the following commands should the administrator use to retrieve its value?

A systems administrator wants to download a package from a remote server. Which of the following are the BEST commands to use for this task? (Choose two.)