Joe, a system administrator, realizes that the time zone on a system is different than his local time zone. Joe runs the command export Tz-America .Chicago to resolve this. However the next Joe logs in, Joe notices the issue has returned. Which of the following is the BEST way for Joe to fix this issue so the solution persists across logins?

A Linux user wants to give read-only permissions to a directory and its contents. Which of the following commands will allow the user to accomplish this task?

A systems administrator documents the instructions on the internal wiki regarding how to turn the company's code into Debian packages. The instructions include the commands used to compile, what tests need to be run, the commands to convert the raw code into a package that apt or dpkg can manage, as well as an of each command.
Which of the following is this an example of?

A systems administrator is troubleshooting an intermittent network connection at the IP address 192.168.1.23.
The administrator wishes to monitor the connection at five-minute intervals for one hour. Which of the following commands will accomplish this task?

Which of the following server roles utilize a heartbeat/polling process? (Choose two.)