A technician types `ls *.txt`. Who expands the `*.txt` pattern before `ls` runs?

A technician runs `ls missing-file.txt 2> error-log.txt`. What is redirected to `error-log.txt`?

The prompt is `joe@example:~$`. Joe has `essay.txt` in his home directory and wants to create a `school` directory, then move the file into it. Which commands accomplish that?

Joe needs a second independent copy of `report.txt` named `report-backup.txt`. Which command fits the goal?

The prompt is `joe@example:~$`. Joe wants to copy `notes.txt` from his home directory into `~/files`. Which command should he run?

Which command matches the basic SSH pattern

Why is Unix important to the history of Linux?

A technician needs to create a zip archive of a directory named `reports`. Which command is appropriate?

Which top-level directory commonly contains system configuration files?

In many Linux examples, what does