It would be especially useful to review the manual pages or any documentation on the following resources:

• ls(1) - lists files.
• apropos “search term” - lists commands that have a given term
• unzip “filename” - unzips zipped/compressed files
• uudecode “filename” - decodes file.
• tac “filename” - flips the text within the vertically.
• tar- does many things with archives, read the man page for more info
• rev “filename” - reverses lines of text.