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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*
