Linux下文件的切分与合并的简单方法介绍
<p>linux下文件分割可以通过split命令来实现，可以将一个大文件拆分成指定大小的多个文件，并且拆分速度非常的快，可以指定按行数分割和安大小分割两种模式。Linux下文件合并可以通过cat命令来实现，非常简单。</p>
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<span><strong>在Linux下用split进行文件分割</strong></span></p>
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<strong>先看下帮助文档</strong></p>
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<code class="plain plain">Usage: split ... ]</code>
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<code class="plain plain">Output fixed-size pieces of INPUT to PREFIXaa, PREFIXab, ...; default</code>
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<code class="plain plain">size is 1000 lines, and default PREFIX is `x'. With no INPUT, or when INPUT</code>
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<code class="plain plain">is -, read standard input.</code>
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<code class="plain plain">Mandatory arguments to long options are mandatory for short options too.</code>
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<code class="plain spaces"> </code><code class="plain plain">-a, --suffix-length=N use suffixes of length N (default 2) 指定拆分文件的后缀长度</code>
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<code class="plain spaces"> </code><code class="plain plain">-b, --bytes=SIZE put SIZE bytes per output file 按字节拆分，默认单位字节</code>
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<code class="plain spaces"> </code><code class="plain plain">-C, --line-bytes=SIZE put at most SIZE bytes of lines per output file 指定单行的最大大小，默认单位字节</code>
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<code class="plain spaces"> </code><code class="plain plain">-d, --numeric-suffixes use numeric suffixes instead of alphabetic 用数字作为拆分文件的后缀</code>
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<code class="plain spaces"> </code><code class="plain plain">-l, --lines=NUMBER put NUMBER lines per output file 按行数进行拆分</code>
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<code class="plain spaces"> </code><code class="plain plain">--verbose print a diagnostic just before each</code>
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<code class="plain spaces"> </code><code class="plain plain">output file is opened</code>
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<code class="plain spaces"> </code><code class="plain plain">--help display this help and exit</code>
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<code class="plain spaces"> </code><code class="plain plain">--version output version information and exit</code>
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<span><strong>模式一：指定分割后文件行数</strong></span></p>
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对与txt文本文件，可以通过指定分割后文件的行数来进行文件分割。</p>
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命令：</p>
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<code class="plain plain">split -l 300 large_file.txt new_file_prefix</code>
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切分后默认生成加后缀aa, ab, ac...以此类推， 当然也可以自定义后缀。</p>
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<span><strong>模式二：指定分割后文件大小</strong></span></p>
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<code class="plain plain">split -b 10m server.log waynelog</code>
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对二进制文件我们同样也可以按文件大小来分隔。</p>
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<strong>在Linux下用cat进行文件合并</strong></p>
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命令：</p>
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<code class="ps keyword">cat</code> <code class="ps plain">small_files* > large_file</code>
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<span><strong>总结</strong></span></p>
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以上就是本文关于Linux下文件的切分与合并的简单方法介绍的全部内容，希望对大家有所帮助。欢迎参阅本站Linux相关：Linux中在防火墙中开启80端口方法示例、Linux企业运维人员常用的150个命令分享、浅谈Linux的库文件等，有什么问题尽管留言，有问题咱就改！</p>
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原文链接：http://www.pythontab.com/html/2017/linuxkaiyuan_0728/1159.html</p>
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