每天一个linux命令系列 - head

最新推荐文章于 2025-07-09 01:22:40 发布

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本文详细介绍了Linux及Unix系统中头命令的使用方法。包括如何显示文件的前几行或字节，以及如何设置输出选项，例如指定文件名是否显示等。适用于初学者了解基本操作以及高级用户掌握更多细节。

Head

Usage: head [OPTION]... [FILE]...
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=[-]K         print the first K bytes of each file;
                             with the leading `-', print all but the last
                             K bytes of each file
-n, --lines=[-]K         print the first K lines instead of the first 10;
                             with the leading `-', print all but the last
                             K 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

K may have a multiplier suffix:
b 512, kB 1000, K 1024, MB 1000*1000, M 1024*1024,
GB 1000*1000*1000, G 1024*1024*1024, and so on for T, P, E, Z, Y.

Report head bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
For complete documentation, run: info coreutils 'head invocation'