!3 增加关于软件包的使用说明
From: @polite2anyone Reviewed-by: @wk333 Signed-off-by: @wk333
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README.md
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# pbzip2
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#### 介绍
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pbzip2是基于bzip2发行的多线程版本,压缩比与bzip2大致相同,但压缩时间上比bzip2减少了线程倍数,
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这是因为bzip2是单线程工作,而bpzip2是多线程的
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pbzip2的输出压缩文件兼容bzip2 v1.0.2以及更新的版本(pbzip2压缩的压缩包可用bzip2进行解压缩)
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#### 软件架构
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软件架构说明
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#### 安装教程
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1.在欧拉操作系统下,可通过运行如下命令进行安装:
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> dnf install pbzip2
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#### 使用说明
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````
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Usage: pbzip2 [-1 .. -9] [-b#cdfhklm#p#qrS#tVz] <filename> <filename2> <filenameN>
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-1 .. -9 set BWT block size to 100k .. 900k (default 900k)
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-b# Block size in 100k steps (default 9 = 900k)
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-c,--stdout Output to standard out (stdout)
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-d,--decompress Decompress file
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-f,--force Overwrite existing output file
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-h,--help Print this help message
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-k,--keep Keep input file, don't delete
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-l,--loadavg Load average determines max number processors to use
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-m# Maximum memory usage in 1MB steps (default 100 = 100MB)
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-p# Number of processors to use (default: autodetect [1])
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-q,--quiet Quiet mode (default)
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-r,--read Read entire input file into RAM and split between processors
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-S# Child thread stack size in 1KB steps (default stack size if unspecified)
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-t,--test Test compressed file integrity
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-v,--verbose Verbose mode
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-V,--version Display version info for pbzip2 then exit
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-z,--compress Compress file (default)
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--ignore-trailing-garbage=# Ignore trailing garbage flag (1 - ignored; 0 - forbidden)
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If no file names are given, pbzip2 compresses or decompresses from standard input to standard output.
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Example: pbzip2 -b15vk myfile.tar
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Example: pbzip2 -p4 -r -5 myfile.tar second*.txt
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Example: tar cf myfile.tar.bz2 --use-compress-prog=pbzip2 dir_to_compress/
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Example: pbzip2 -d -m500 myfile.tar.bz2
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Example: pbzip2 -dc myfile.tar.bz2 | tar x
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Example: pbzip2 -c < myfile.txt > myfile.txt.bz2
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````
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#### 参与贡献
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1. Fork 本仓库
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2. 新建 Feat_xxx 分支
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3. 提交代码
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4. 新建 Pull Request
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#### 码云特技
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1. 使用 Readme\_XXX.md 来支持不同的语言,例如 Readme\_en.md, Readme\_zh.md
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2. 码云官方博客 [blog.gitee.com](https://blog.gitee.com)
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3. 你可以 [https://gitee.com/explore](https://gitee.com/explore) 这个地址来了解码云上的优秀开源项目
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4. [GVP](https://gitee.com/gvp) 全称是码云最有价值开源项目,是码云综合评定出的优秀开源项目
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5. 码云官方提供的使用手册 [https://gitee.com/help](https://gitee.com/help)
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6. 码云封面人物是一档用来展示码云会员风采的栏目 [https://gitee.com/gitee-stars/](https://gitee.com/gitee-stars/)
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