Comandos de la terminal/xz

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xz

[rrc@Llawyr ComandosDeLaTerminal]$ xz --help
Usage: xz [OPTION]... [FILE]...
Compress or decompress FILEs in the .xz format.

  -z, --compress      force compression
  -d, --decompress    force decompression
  -t, --test          test compressed file integrity
  -l, --list          list information about .xz files
  -k, --keep          keep (don't delete) input files
  -f, --force         force overwrite of output file and (de)compress links
  -c, --stdout        write to standard output and don't delete input files
  -0 ... -9           compression preset; default is 6; take compressor *and*
                      decompressor memory usage into account before using 7-9!
  -e, --extreme       try to improve compression ratio by using more CPU time;
                      does not affect decompressor memory requirements
  -q, --quiet         suppress warnings; specify twice to suppress errors too
  -v, --verbose       be verbose; specify twice for even more verbose
  -h, --help          display this short help and exit
  -H, --long-help     display the long help (lists also the advanced options)
  -V, --version       display the version number and exit

With no FILE, or when FILE is -, read standard input.

Report bugs to <lasse.collin@tukaani.org> (in English or Finnish).
XZ Utils home page: <http://tukaani.org/xz/>

[rrc@Llawyr ~]$ xz -H
Usage: xz [OPTION]... [FILE]...
Compress or decompress FILEs in the .xz format.

Mandatory arguments to long options are mandatory for short options too.

 Operation mode:

  -z, --compress      force compression
  -d, --decompress    force decompression
  -t, --test          test compressed file integrity
  -l, --list          list information about .xz files

 Operation modifiers:

  -k, --keep          keep (don't delete) input files
  -f, --force         force overwrite of output file and (de)compress links
  -c, --stdout        write to standard output and don't delete input files
      --single-stream decompress only the first stream, and silently
                      ignore possible remaining input data
      --no-sparse     do not create sparse files when decompressing
  -S, --suffix=.SUF   use the suffix `.SUF' on compressed files
      --files[=FILE]  read filenames to process from FILE; if FILE is
                      omitted, filenames are read from the standard input;
                      filenames must be terminated with the newline character
      --files0[=FILE] like --files but use the null character as terminator

 Basic file format and compression options:

  -F, --format=FMT    file format to encode or decode; possible values are
                      `auto' (default), `xz', `lzma', and `raw'
  -C, --check=CHECK   integrity check type: `none' (use with caution),
                      `crc32', `crc64' (default), or `sha256'
  -0 ... -9           compression preset; default is 6; take compressor *and*
                      decompressor memory usage into account before using 7-9!
  -e, --extreme       try to improve compression ratio by using more CPU time;
                      does not affect decompressor memory requirements
      --block-size=SIZE
                      when compressing to the .xz format, start a new block
                      after every SIZE bytes of input; 0=disabled (default)
      --block-list=SIZES
                      when compressing to the .xz format, start a new block
                      after the given intervals of uncompressed data
      --memlimit-compress=LIMIT
      --memlimit-decompress=LIMIT
  -M, --memlimit=LIMIT
                      set memory usage limit for compression, decompression,
                      or both; LIMIT is in bytes, % of RAM, or 0 for defaults
      --no-adjust     if compression settings exceed the memory usage limit,
                      give an error instead of adjusting the settings downwards

 Custom filter chain for compression (alternative for using presets):

  --lzma1[=OPTS]      LZMA1 or LZMA2; OPTS is a comma-separated list of zero or
  --lzma2[=OPTS]      more of the following options (valid values; default):
                        preset=PRE reset options to a preset (0-9[e])
                        dict=NUM   dictionary size (4KiB - 1536MiB; 8MiB)
                        lc=NUM     number of literal context bits (0-4; 3)
                        lp=NUM     number of literal position bits (0-4; 0)
                        pb=NUM     number of position bits (0-4; 2)
                        mode=MODE  compression mode (fast, normal; normal)
                        nice=NUM   nice length of a match (2-273; 64)
                        mf=NAME    match finder (hc3, hc4, bt2, bt3, bt4; bt4)
                        depth=NUM  maximum search depth; 0=automatic (default)

  --x86[=OPTS]        x86 BCJ filter (32-bit and 64-bit)
  --powerpc[=OPTS]    PowerPC BCJ filter (big endian only)
  --ia64[=OPTS]       IA-64 (Itanium) BCJ filter
  --arm[=OPTS]        ARM BCJ filter (little endian only)
  --armthumb[=OPTS]   ARM-Thumb BCJ filter (little endian only)
  --sparc[=OPTS]      SPARC BCJ filter
                      Valid OPTS for all BCJ filters:
                        start=NUM  start offset for conversions (default=0)

  --delta[=OPTS]      Delta filter; valid OPTS (valid values; default):
                        dist=NUM   distance between bytes being subtracted
                                   from each other (1-256; 1)

 Other options:

  -q, --quiet         suppress warnings; specify twice to suppress errors too
  -v, --verbose       be verbose; specify twice for even more verbose
  -Q, --no-warn       make warnings not affect the exit status
      --robot         use machine-parsable messages (useful for scripts)

      --info-memory   display the total amount of RAM and the currently active
                      memory usage limits, and exit
  -h, --help          display the short help (lists only the basic options)
  -H, --long-help     display this long help and exit
  -V, --version       display the version number and exit

With no FILE, or when FILE is -, read standard input.

Report bugs to <lasse.collin@tukaani.org> (in English or Finnish).
XZ Utils home page: <http://tukaani.org/xz/>

[rrc@Llawyr ComandosDeLaTerminal]$ xz -V
xz (XZ Utils) 5.1.2alpha
liblzma 5.1.2alpha

[rrc@Llawyr ComandosDeLaTerminal]$ su -c "rpm -qf $( which xz )"
Password: 
xz-5.1.2-0.alpha.4.mga4

[rrc@Llawyr 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@Llawyr ComandosDeLaTerminal]$ xz -z Uniq*

[rrc@Llawyr ComandosDeLaTerminal]$ ls -al Uniq*
-rw------- 1 rrc rrc 104 Apr  1  2014 UniqEjemploConLineasVacios.xz
-rw------- 1 rrc rrc  92 Apr  1  2014 UniqEjemploMayusc.xz
-rw------- 1 rrc rrc  92 Apr  1  2014 UniqEjemploMinusc.xz
-rw------- 1 rrc rrc 100 Jan  2  2014 UniqEjemplo.xz
-rw------- 1 rrc rrc 100 Jan  2  2014 UniqSortEjemplo.xz

[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]$ xz -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 64 Sep  6 08:53 UmaskPruebaArchivo2.xz
-rw------- 1 rrc rrc 32 Mar  5  2014 UmaskPruebaArchivo.xz

[rrc@Llawyr ComandosDeLaTerminal]$ xz -zk UmaskPruebaArchivo UmaskPruebaArchivo2 
xz: UmaskPruebaArchivo.xz: File exists
xz: UmaskPruebaArchivo2.xz: File exists

[rrc@Llawyr ComandosDeLaTerminal]$ xz -zkf UmaskPruebaArchivo UmaskPruebaArchivo2

[rrc@Llawyr ComandosDeLaTerminal]$ xz -zkfv UmaskPruebaArchivo UmaskPruebaArchivo2 
UmaskPruebaArchivo (1/2)
  100 %                  32 B / 0 B > 9.999                                    

UmaskPruebaArchivo2 (2/2)
  100 %                  64 B / 6 B > 9.999                                    

[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]$ xz -zkv MySQLDumpwiki-20141002.sql
MySQLDumpwiki-20141002.sql (1/1)
  100 %      2 594.3 KiB / 13.8 MiB = 0.183   3.0 MiB/s       0:04             

[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 2.6M Oct  2 17:04 MySQLDumpwiki-20141002.sql.xz

[rrc@Llawyr ComandosDeLaTerminal]$ rm MySQLDumpwiki-20141002.sql.xz
rm: remove regular file ‘MySQLDumpwiki-20141002.sql.xz’? y

[rrc@Llawyr ComandosDeLaTerminal]$ xz -z1kv MySQLDumpwiki-20141002.sql
MySQLDumpwiki-20141002.sql (1/1)
  100 %      2 880.5 KiB / 13.8 MiB = 0.204                                    

[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 2.9M Oct  2 17:04 MySQLDumpwiki-20141002.sql.xz

[rrc@Llawyr ComandosDeLaTerminal]$ rm MySQLDumpwiki-20141002.sql.xz
rm: remove regular file ‘MySQLDumpwiki-20141002.sql.xz’? y

[rrc@Llawyr ComandosDeLaTerminal]$ xz -z9kv MySQLDumpwiki-20141002.sql
MySQLDumpwiki-20141002.sql (1/1)
  100 %      2 591.3 KiB / 13.8 MiB = 0.183   3.0 MiB/s       0:04             

[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 2.6M Oct  2 17:04 MySQLDumpwiki-20141002.sql.xz

[rrc@Llawyr ComandosDeLaTerminal]$ rm MySQLDumpwiki-20141002.sql.xz
rm: remove regular file ‘MySQLDumpwiki-20141002.sql.xz’? y

[rrc@Llawyr ComandosDeLaTerminal]$ xz -zekv MySQLDumpwiki-20141002.sql
MySQLDumpwiki-20141002.sql (1/1)
  100 %      2 588.4 KiB / 13.8 MiB = 0.183   2.2 MiB/s       0:06             

[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 2.6M Oct  2 17:04 MySQLDumpwiki-20141002.sql.xz


[rrc@Llawyr ComandosDeLaTerminal]$ xz -l MySQLDumpwiki-20141002.sql.xz 
Strms  Blocks   Compressed Uncompressed  Ratio  Check   Filename
    1       1  2 588.4 KiB     13.8 MiB  0.183  CRC64   MySQLDumpwiki-20141002.sql.xz

[rrc@Llawyr ComandosDeLaTerminal]$ xz -lv MySQLDumpwiki-20141002.sql.xz 
MySQLDumpwiki-20141002.sql.xz (1/1)
  Streams:            1
  Blocks:             1
  Compressed size:    2 588.4 KiB (2 650 532 B)
  Uncompressed size:  13.8 MiB (14 493 632 B)
  Ratio:              0.183
  Check:              CRC64
  Stream padding:     0 B
  Streams:
    Stream    Blocks      CompOffset    UncompOffset        CompSize      UncompSize  Ratio  Check      Padding
         1         1               0               0       2 650 532      14 493 632  0.183  CRC64            0
  Blocks:
    Stream     Block      CompOffset    UncompOffset       TotalSize      UncompSize  Ratio  Check
         1         1              12               0       2 650 492      14 493 632  0.183  CRC64

[rrc@Llawyr ComandosDeLaTerminal]$ xz -t MySQLDumpwiki-20141002.sql.xz

[rrc@Llawyr ComandosDeLaTerminal]$ xz -tv MySQLDumpwiki-20141002.sql.xz
MySQLDumpwiki-20141002.sql.xz (1/1)
  100 %      2 591.3 KiB / 13.8 MiB = 0.183                                    

[rrc@Llawyr ComandosDeLaTerminal]$ xz -dv MySQLDumpwiki-20141002.sql.xz
MySQLDumpwiki-20141002.sql.xz (1/1)
xz: MySQLDumpwiki-20141002.sql: File exists

[rrc@Llawyr ComandosDeLaTerminal]$ xz -dfv MySQLDumpwiki-20141002.sql.xz
MySQLDumpwiki-20141002.sql.xz (1/1)
  100 %      2 591.3 KiB / 13.8 MiB = 0.183         



[rrc@Llawyr ~]$ ls -al $( which unxz )
lrwxrwxrwx 1 root root 2 Sep 22 13:33 /usr/bin/unxz -> xz*