Under Linux file system compression and packaging commands

Under Linux file system compression and packaging commands

Commonly used to expand the compressed file name
* .Z
* .zip
* .gz
* .bz2
* .xz
* .tar
* .tar.gz
* .tar.bz2
* .tar.xz

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Compression command

gzip, cat / more / Less / grep

• Description: Replace the early compress command provides better compression ratio, the most widely used compression command, the establishment of a compressed file is * .gz

gzip [-cdtv#] 文件名
zcat 文件名.gz

• Parameter Description:
  • -c: the compressed data output to the screen, the data stream may be processed by the redirection
  • -d: Unzip the parameters
  • -t: Check the consistency of the compressed file, see the file for errors
  • -v: display the original document / file compression compression ratio
  • - #: compression level [1-9], by default6
    • 1: The fastest, the worst compression ratio
    • ...
    • 9: slowest, the best compression ratio
• zcat / zmore / zless may correspond to a cat / more / less reads the compressed file is a plain text file compressed

bzip2, bzcat/bzmore/bzless/bzgrep

• Description: Replace gzip, suffix .bz2, usage almost in line with gzip.

bzip2 [-cdkzv#] 文件名
bzcat 文件名.gz

• Parameter Description:
  • -c: the compressed data output to the screen, the data stream may be processed by the redirection
  • -d: Unzip the parameters
  • -k: keep the original files will not delete the original file
  • -z: compression parameter (the default value, you can not add)
  • -v: display the original document / file compression compression ratio
  • - #: compression level [1-9], by default6
    • 1: The fastest, the worst compression ratio
    • 9: slowest, the best compression ratio

具体范例
# 压缩并将信息显示
bzip2 -v services*
# 读出上例文件内容
bzcat services.bz2
# 解压缩
bzip2 -d services.bz2
# 将上例中解开的services采用最佳压缩比压缩，并保留原本文件
bzip2 -9 -c services > services.bz2

Note here -c ... > ...'s usage: original content to be output to the screen turn into File -> Specific seen in bash

xz, xzcat/xzmore/xzless/xzgrep

• Description: software higher compression ratio, the use of two substantially identical with the above-described
• Parameter Description:
  • -c: the compressed data output to the screen, the data stream may be processed by the redirection
  • -d: Unzip the parameters
  • -t: Check the consistency of the compressed file, see the file for errors
  • -l: List information about file compression
  • -k: keep the original files will not delete the original file
  • - #: compression level [1-9], by default6
    • 1: The fastest, the worst compression ratio
    • 9: slowest, the best compression ratio

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Compare the running time of a few commands
time [gzip|bzip2|xz] -c wget-log > log.[gz|bz2|xz]

Package command

takes

• Description: a plurality of files or directories to package a large file command
• Description of common parameters
  • -c [can be used with -v] established packed files
  • -t [can be used with -v] to view the content
  • -x [can be used with -v] decompression
  • -v show up in the file name processing
  • -z gzip compression by supporting / decompression, the best file extension is .tar.gz
  • -j bzip2 compressed by supporting / decompression, file name suffix is ​​the best .tar.bz2
  • -J by xz ~~, file suffix .tar.xz
  • -f file name to be processed immediately put together a single write may not forget []
  • -C compression specific directory Solutions
  • -p [can be used with -c] keep a backup of the original data attributes and privileges, commonly used for backup
  • -P retained absolute path, which allows the root directory contains backup data exists
  • --exclude = FILE during compression, will not pack FILE
  • To note: -z, -j, -Jnot with the use!
• Commonly packaged with
  • Packing and compression:tar [-z|-j|-J] [cv] [-f 待建立的新文件名] filename
  • View File Name:tar [-z|-j|-J] [tv] [-f 既有的tar文件名]
  • unzip:tar [-z|-j|-J] [xv] [-f 既有的tar文件名] [-C目录]

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