每天回顾linux命令（head）

head命令

head命令用于显示文件的开头的内容。在默认情况下，head命令显示文件的头10行内容。

语法

head (选项) (参数)

选项

-n number ：指定显示头部内容的行数。

root@68fc0a9bc6dd:/home/wzm/testtail# head redis.conf -n 3
# Redis configuration file example.
#
# Note that in order to read the configuration file, Redis must be

-c number：指定显示头部的字符数。

root@68fc0a9bc6dd:/home/wzm/testtail# head redis.conf -c 10
# Redis coroot@68fc0a9bc6dd:/home/wzm/testtail#

-q：不显示文件名

root@68fc0a9bc6dd:/home/wzm/testtail# head -n 3 -q redis.conf README.md
# Redis configuration file example.
#
# Note that in order to read the configuration file, Redis must be
This README is just a fast *quick start* document. You can find more detailed documentation at http://redis.io. 
What is Redis?

-v：总是显示文件名的头信息，默认

root@68fc0a9bc6dd:/home/wzm/testtail# head -n 3 -v redis.conf README.md
==> redis.conf <==
# Redis configuration file example.
#
# Note that in order to read the configuration file, Redis must be

==> README.md <==
This README is just a fast *quick start* document. You can find more detailed documentation at http://redis.io. 
What is Redis?
root@68fc0a9bc6dd:/home/wzm/testtail#

参数

文件列表：指定显示头部内容的文件列表。