Comandos de la terminal/bzip2
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bzip2
[rrc@Pridd ~]$ bzip2 --help
bzip2, a block-sorting file compressor. Version 1.0.6, 6-Sept-2010.
usage: bzip2 [flags and input files in any order]
-h --help print this message
-d --decompress force decompression
-z --compress force compression
-k --keep keep (don't delete) input files
-f --force overwrite existing output files
-t --test test compressed file integrity
-c --stdout output to standard out
-q --quiet suppress noncritical error messages
-v --verbose be verbose (a 2nd -v gives more)
-L --license display software version & license
-V --version display software version & license
-s --small use less memory (at most 2500k)
-1 .. -9 set block size to 100k .. 900k
--fast alias for -1
--best alias for -9
If invoked as `bzip2', default action is to compress.
as `bunzip2', default action is to decompress.
as `bzcat', default action is to decompress to stdout.
If no file names are given, bzip2 compresses or decompresses
from standard input to standard output. You can combine
short flags, so `-v -4' means the same as -v4 or -4v, &c.
[rrc@Pridd ~]$ bzip2 --version
bzip2, a block-sorting file compressor. Version 1.0.6, 6-Sept-2010.
Copyright (C) 1996-2010 by Julian Seward.
This program is free software; you can redistribute it and/or modify
it under the terms set out in the LICENSE file, which is included
in the bzip2-1.0.6 source distribution.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
LICENSE file for more details.
bzip2: I won't write compressed data to a terminal.
bzip2: For help, type: `bzip2 --help'.
[rrc@Pridd ~]$ su -c "rpm -qf $( which bzip2 )"
Password:
bzip2-1.0.6-4.mga4
[rrc@Pridd ~]$ cd ComandosDeLaTerminal
[rrc@Pridd ComandosDeLaTerminal]$ ls -al Uniq*
-rw------- 1 rrc rrc 48 Jan 2 2014 UniqEjemplo
-rw------- 1 rrc rrc 54 Apr 1 2014 UniqEjemploConLineasVacios
-rw------- 1 rrc rrc 34 Apr 1 2014 UniqEjemploMayusc
-rw------- 1 rrc rrc 34 Apr 1 2014 UniqEjemploMinusc
-rw------- 1 rrc rrc 48 Jan 2 2014 UniqSortEjemplo
[rrc@Pridd ComandosDeLaTerminal]$ bzip2 -z Uniq*
[rrc@Pridd ComandosDeLaTerminal]$ ls -al Uniq*
-rw------- 1 rrc rrc 73 Jan 2 2014 UniqEjemplo.bz2
-rw------- 1 rrc rrc 77 Apr 1 2014 UniqEjemploConLineasVacios.bz2
-rw------- 1 rrc rrc 65 Apr 1 2014 UniqEjemploMayusc.bz2
-rw------- 1 rrc rrc 62 Apr 1 2014 UniqEjemploMinusc.bz2
-rw------- 1 rrc rrc 71 Jan 2 2014 UniqSortEjemplo.bz2
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al UmaskPruebaA*
-rw------- 1 rrc rrc 0 Mar 5 2014 UmaskPruebaArchivo
-rw------- 1 rrc rrc 6 Sep 6 08:53 UmaskPruebaArchivo2
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -zk UmaskPruebaA*
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al UmaskPruebaA*
-rw------- 1 rrc rrc 0 Mar 5 2014 UmaskPruebaArchivo
-rw------- 1 rrc rrc 6 Sep 6 08:53 UmaskPruebaArchivo2
-rw------- 1 rrc rrc 44 Sep 6 08:53 UmaskPruebaArchivo2.bz2
-rw------- 1 rrc rrc 14 Mar 5 2014 UmaskPruebaArchivo.bz2
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -zk UmaskPruebaArchivo UmaskPruebaArchivo2
bzip2: Output file UmaskPruebaArchivo.bz2 already exists.
bzip2: Output file UmaskPruebaArchivo2.bz2 already exists.
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al UmaskPruebaA*
-rw------- 1 rrc rrc 0 Mar 5 2014 UmaskPruebaArchivo
-rw------- 1 rrc rrc 6 Sep 6 08:53 UmaskPruebaArchivo2
-rw------- 1 rrc rrc 44 Sep 6 08:53 UmaskPruebaArchivo2.bz2
-rw------- 1 rrc rrc 14 Mar 5 2014 UmaskPruebaArchivo.bz2
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -zkf UmaskPruebaArchivo UmaskPruebaArchivo2
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -zkfv UmaskPruebaArchivo UmaskPruebaArchivo2
UmaskPruebaArchivo: no data compressed.
UmaskPruebaArchivo2: 0.136:1, 58.667 bits/byte, -633.33% saved, 6 in, 44 out.
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -zkfvv UmaskPruebaArchivo UmaskPruebaArchivo2
UmaskPruebaArchivo:
final combined CRC = 0x00000000
no data compressed.
UmaskPruebaArchivo2:
block 1: crc = 0x5f557ca5, combined CRC = 0x5f557ca5, size = 6
final combined CRC = 0x5f557ca5
0.136:1, 58.667 bits/byte, -633.33% saved, 6 in, 44 out.
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -zkfvvv UmaskPruebaArchivo UmaskPruebaArchivo2
UmaskPruebaArchivo:
final combined CRC = 0x00000000
no data compressed.
UmaskPruebaArchivo2:
block 1: crc = 0x5f557ca5, combined CRC = 0x5f557ca5, size = 6
6 in block, 7 after MTF & 1-2 coding, 6+2 syms in use
initial group 2, [0 .. 4], has 3 syms (42.9%)
initial group 1, [5 .. 7], has 4 syms (57.1%)
pass 1: size is 5, grp uses are 1 0
pass 2: size is 2, grp uses are 1 0
pass 3: size is 2, grp uses are 1 0
pass 4: size is 2, grp uses are 1 0
bytes: mapping 11, selectors 2, code lengths 3, codes 3
final combined CRC = 0x5f557ca5
0.136:1, 58.667 bits/byte, -633.33% saved, 6 in, 44 out.
[rrc@Llawyr ComandosDeLaTerminal]$ ls -alh MySQLDumpwiki-20141002.sql*
-rw-r--r-- 1 rrc rrc 14M Oct 2 17:04 MySQLDumpwiki-20141002.sql
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -zkv MySQLDumpwiki-20141002.sql
MySQLDumpwiki-20141002.sql: 4.486:1, 1.783 bits/byte, 77.71% saved, 14493632 in, 3230944 out.
[rrc@Llawyr ComandosDeLaTerminal]$ ls -alh MySQLDumpwiki-20141002.sql*
-rw-r--r-- 1 rrc rrc 14M Oct 2 17:04 MySQLDumpwiki-20141002.sql
-rw-r--r-- 1 rrc rrc 3.1M Oct 2 17:04 MySQLDumpwiki-20141002.sql.bz2
[rrc@Llawyr ComandosDeLaTerminal]$ rm MySQLDumpwiki-20141002.sql.bz2
rm: remove regular file ‘MySQLDumpwiki-20141002.sql.bz2’? y
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -z1kv MySQLDumpwiki-20141002.sql
MySQLDumpwiki-20141002.sql: 3.725:1, 2.148 bits/byte, 73.15% saved, 14493632 in, 3891413 out.
[rrc@Llawyr ComandosDeLaTerminal]$ ls -alh MySQLDumpwiki-20141002.sql*
-rw-r--r-- 1 rrc rrc 14M Oct 2 17:04 MySQLDumpwiki-20141002.sql
-rw-r--r-- 1 rrc rrc 3.8M Oct 2 17:04 MySQLDumpwiki-20141002.sql.bz2
[rrc@Llawyr ComandosDeLaTerminal]$ rm MySQLDumpwiki-20141002.sql.bz2
rm: remove regular file ‘MySQLDumpwiki-20141002.sql.bz2’? y
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -z9kv MySQLDumpwiki-20141002.sql
MySQLDumpwiki-20141002.sql: 4.486:1, 1.783 bits/byte, 77.71% saved, 14493632 in, 3230944 out.
[rrc@Llawyr ComandosDeLaTerminal]$ ls -alh MySQLDumpwiki-20141002.sql*
-rw-r--r-- 1 rrc rrc 14M Oct 2 17:04 MySQLDumpwiki-20141002.sql
-rw-r--r-- 1 rrc rrc 3.1M Oct 2 17:04 MySQLDumpwiki-20141002.sql.bz2
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -t MySQLDumpwiki-20141002.sql.bz2
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -tv MySQLDumpwiki-20141002.sql.bz2
MySQLDumpwiki-20141002.sql.bz2: ok
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -tvv MySQLDumpwiki-20141002.sql.bz2
MySQLDumpwiki-20141002.sql.bz2:
[1: huff+mtf rt+rld]
[2: huff+mtf rt+rld]
[3: huff+mtf rt+rld]
[4: huff+mtf rt+rld]
[5: huff+mtf rt+rld]
[6: huff+mtf rt+rld]
[7: huff+mtf rt+rld]
[8: huff+mtf rt+rld]
[9: huff+mtf rt+rld]
[10: huff+mtf rt+rld]
[11: huff+mtf rt+rld]
[12: huff+mtf rt+rld]
[13: huff+mtf rt+rld]
[14: huff+mtf rt+rld]
[15: huff+mtf rt+rld]
[16: huff+mtf rt+rld]
[17: huff+mtf rt+rld]
ok
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -tvvv MySQLDumpwiki-20141002.sql.bz2
MySQLDumpwiki-20141002.sql.bz2:
[1: huff+mtf rt+rld {0xe9474220, 0xe9474220}]
[2: huff+mtf rt+rld {0xf99291da, 0xf99291da}]
[3: huff+mtf rt+rld {0xf0ff5674, 0xf0ff5674}]
[4: huff+mtf rt+rld {0x92a415eb, 0x92a415eb}]
[5: huff+mtf rt+rld {0xa89a8c48, 0xa89a8c48}]
[6: huff+mtf rt+rld {0x996100ff, 0x996100ff}]
[7: huff+mtf rt+rld {0x6686cb2b, 0x6686cb2b}]
[8: huff+mtf rt+rld {0x5937f7f5, 0x5937f7f5}]
[9: huff+mtf rt+rld {0xa8c9ed48, 0xa8c9ed48}]
[10: huff+mtf rt+rld {0xc2686ca1, 0xc2686ca1}]
[11: huff+mtf rt+rld {0xe8324938, 0xe8324938}]
[12: huff+mtf rt+rld {0xcca514fb, 0xcca514fb}]
[13: huff+mtf rt+rld {0xbc32a05b, 0xbc32a05b}]
[14: huff+mtf rt+rld {0x61e54d38, 0x61e54d38}]
[15: huff+mtf rt+rld {0x8cd5eae2, 0x8cd5eae2}]
[16: huff+mtf rt+rld {0xbcc01ab9, 0xbcc01ab9}]
[17: huff+mtf rt+rld {0x379e8ccb, 0x379e8ccb}]
combined CRCs: stored = 0x5d4f5dcf, computed = 0x5d4f5dcf
ok
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -dvvv MySQLDumpwiki-20141002.sql.bz2
bzip2: Output file MySQLDumpwiki-20141002.sql already exists.
[rrc@Llawyr ComandosDeLaTerminal]$ bzip2 -dfvvv MySQLDumpwiki-20141002.sql.bz2
MySQLDumpwiki-20141002.sql.bz2:
[1: huff+mtf rt+rld {0xe9474220, 0xe9474220}]
[2: huff+mtf rt+rld {0xf99291da, 0xf99291da}]
[3: huff+mtf rt+rld {0xf0ff5674, 0xf0ff5674}]
[4: huff+mtf rt+rld {0x92a415eb, 0x92a415eb}]
[5: huff+mtf rt+rld {0xa89a8c48, 0xa89a8c48}]
[6: huff+mtf rt+rld {0x996100ff, 0x996100ff}]
[7: huff+mtf rt+rld {0x6686cb2b, 0x6686cb2b}]
[8: huff+mtf rt+rld {0x5937f7f5, 0x5937f7f5}]
[9: huff+mtf rt+rld {0xa8c9ed48, 0xa8c9ed48}]
[10: huff+mtf rt+rld {0xc2686ca1, 0xc2686ca1}]
[11: huff+mtf rt+rld {0xe8324938, 0xe8324938}]
[12: huff+mtf rt+rld {0xcca514fb, 0xcca514fb}]
[13: huff+mtf rt+rld {0xbc32a05b, 0xbc32a05b}]
[14: huff+mtf rt+rld {0x61e54d38, 0x61e54d38}]
[15: huff+mtf rt+rld {0x8cd5eae2, 0x8cd5eae2}]
[16: huff+mtf rt+rld {0xbcc01ab9, 0xbcc01ab9}]
[17: huff+mtf rt+rld {0x379e8ccb, 0x379e8ccb}]
combined CRCs: stored = 0x5d4f5dcf, computed = 0x5d4f5dcf
done
[rrc@Llawyr ~]$ ls -al $( which bunzip2 )
lrwxrwxrwx 1 root root 5 Sep 22 13:33 /usr/bin/bunzip2 -> bzip2*
