The GNU version of the tar archiving utility

-z, --gzip, --gunzip --ungzip

-x, --extract, --get
      extract files from an archive

-f, --file ARCHIVE
      use archive file or device ARCHIVE

-b, --blocking-factor BLOCKS
      BLOCKS x 512 bytes per record

-a, --auto-compress
      use archive suffix to determine the compression program

-r, --append
      append files to the end of an archive