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NAME
       bzip2, bunzip2 - v0.9.5
       bzcat -
       bzip2recover -  bzip2

       bzip2 [ -cdfkqstvzVL123456789 ] [ filenames ...  ]
       bunzip2 [ -fkvsVL ] [ filenames ...  ]
       bzcat [ -s ] [ filenames ...  ]
       bzip2recover filename

       bzip2  Burrows-Wheeler  Huffman  LZ77/LZ78  PPM

        GNU gzip

       bzip2   ".bz2"   MSDOS bzip2 bzip2

       bzip2 bunzip2   -f

        bzip2 bzip2

       bunzip2 ( bzip2 -d) bzip2 bzip2

              filename.bz2       filename
              filename.bz        filename
              filename.tbz2      filename.tar
              filename.tbz       filename.tar
              anyothername       anyothername.out

        .bz2, .bz, .tbz2 .tbz, .bzip2 .out

       bzip2

       bunzip2
        bzip2 (-t)

        -c  0.9.0 bzip2 bzip2

       bzcat ( bzip2 -dc)

       bzip2 BZIP2 BZIP

         100  50   8.05   0.5%

       bzip2  32  CRC bzip2 bzip2recover

        0  1 I/O  2 bzip2  3

       -c --stdout

       -d --decompress
               bzip2, bunzip2 bzcat bzip2

       -z --compress
              -d

       -t --test

       -f --force
               bzip2 bzip2  bzip2

       -k --keep

       -s --small
                2.5  2300k

              -s 200k  200k 8 -s

       -q --quiet
               I/O

       -v --verbose
               --  -v  bzip2

       -L --license -V --version

       -1 to -9
               100 k200 k ..  900 k

       --     "-" "-" bzip2 -- -myfilename.

       --repetitive-fast --repetitive-best
               0.9.5 0.9.5

       bzip2   -1  -9  100,000 900,000 bunzip2   -1  -9

              :   400k + ( 8 x  )

              : 100k + ( 4 x  ),
                             100k + ( 2.5 x  )

        (give rapidly diminishing marginal returns) bzip2    200  300k

        900k bunzip2  3700k  4MB bunzip2  2300k  -s

         -9  20,000  7600k  400k+20000*8=560k 3700k  100k + 20000 * 4 = 180 k

        Calgary  14  14  3,141,622

                              -s
           Flag

            -1      1200k       500k         350k      914704
            -2      2000k       900k         600k      877703
            -3      2800k      1300k         850k      860338
            -4      3600k      1700k        1100k      846899
            -5      4400k      2100k        1350k      845160
            -6      5200k      2500k        1600k      838626
            -7      6100k      2900k        1850k      834096
            -8      6800k      3300k        2100k      828642
            -9      7600k      3700k        2350k      828642

       bzip2  900k  .bz2

        48  32  CRC

       bzip2recover  .bz2  .bz2 bzip2 -t

       bzip2recover     "rec0001file.bz2"    "rec0002file.bz2"    "bzip2   -dc
       rec*file.bz2>recovered_data"

       bzip2recover

          "aabaabaabaab......"   0.9.5   10:1  100:1  -vvvv

       bzip2 bzip2

       I/O bzip2  I/O

        0.9.5 bzip2  bzip2  0.1pl20.9.0 0.9.0 0.1pl2

       bzip2recover  32  512

       Julian Seward, jseward@acm.org.

       http://www.muraroa.demon.co.uk

       bzip2 Michael Burrows  David Wheeler David WheelerHuffman Peter Fenwick
       bzip Alistair Moffat Ian Witten bzip Christian von Roques   bela Lubkin


[]
       Liu JingSong <js-liu@263.net>


[]
       2001/01/31


[ Linux  man ]
       http://cmpp.linuxforum.net

                                                                      bzip2(1)