How to undo rar archive extraction? Incorrectly extracted with 7z utility, multiple errors, dirty extraction with "unsupported method".
Remove what was extracted with the
rm command. Normally I would believe you need to
rm a directory and all files of the extract will be inside that directory.
A tar file itself is not removed so you can always redo the extract. Though ... what you say here probably means you have a tar file that is not complete or not downloaded correctly.
To help more we need the actual command used and error notices.