tar -- Tape File Archiver
% /usr/sbin/tar - [key] [files]
    stdin read if no files specified
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tar tvf ~/scr150.tar
tar cvf archivename.tar ____________ ____________ ____________
recursiveness is implied
txt
directories  - leave off the slash

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compress:
% tar -cf - FOLDER | gzip > FOLDER.tgz
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decompress:
% gzcat FOLDER.tgz | tar -xf -