Back up the editing$\_$final$\_$lab.txt file and append the date $($in seconds$)$ at the end of the file name preceded with an underscore $()$ character. Use the lab$\_$file shell variable.

$(3)$

Append a dashed line to the editing$\_$final$\_$lab. txt file. The dashed line should contain $12$ dash $(-)$ characters for this lab to be graded correctly. Use the lab$\_$file shell variable.

List the content of the Documents directory, and append the output to the editing$\_$final$\_$lab. txt file, and display the output in the terminal. Use the tee command and the lab$\_$file shell variable.

$(3)$

Confirm that the directory listing is at the bottom of the lab file. Use the lab$\_$file shell variable.

Evaluation

As the student user on the workstation machine, use the lab command to grade your work. Correct any reported failures and rerun the command until successful.

$[$studenteworkstation $]$ lab grade edit$-$review