head 命令的用法

最新推荐文章于 2024-11-16 15:16:06 发布

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最新推荐文章于 2024-11-16 15:16:06 发布

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本文详细介绍了Linux中head命令的使用方法及各项参数含义。head命令能够显示文件的前几行内容，默认情况下显示前10行。文章还解释了如何通过选项定制输出的行数或字节数，以及如何为多个文件应用此命令。

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NAME
       head - output the first part of files

SYNOPSIS
       head [OPTION]... [FILE]...

DESCRIPTION
       Print the first 10 lines of each FILE to standard output. With more
       than one FILE, precede each with a header giving the file name.    With
       no FILE, or when FILE is -, read standard input.

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

       -c, --bytes=[-]N
          print the first N bytes of each file; with the    leading ‘-’,
          print all but the last N bytes of each file

       -n, --lines=[-]N
          print the first N lines instead of the first 10; with the lead-
          ing ‘-’, print all but the last N lines of each file

       -q, --quiet, --silent
          never print headers giving file names

       -v, --verbose
          always print headers giving file names

       --help display this help and exit

       --version
          output version information and exit

       N may have a multiplier suffix: b 512, k 1024, m 1024*1024.