head

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。

格式

head [参数] [文件]

参数选项

参数	备注
-q	不显示文件名的头信息
-v	总是显示文件名的头信息
-c	<字节> 显示字节数
-n	<行数> 显示的行数

实例

显示文件的前n行

命令： **head -n 5 myFile **

[root@VM_0_9_centos ~]# cat myFile

this is line 1;

this is line 2;

this is line 3;

tihs is line 4;

this is line 5;

this is line 6;

this is line 7;

this is line 8;

this is line 9;

this is line 10;

this is line 11;

this is line 12;

this is line 13;

this is line 14;

[root@VM_0_9_centos ~]# head -n 5 myFile

this is line 1;

this is line 2;

this is line 3;

tihs is line 4;

this is line 5;

显示文件前n个字节

命令： **head -c 10 myFile **

[root@VM_0_9_centos ~]# head -c 10 myFile

this is li

[root@VM_0_9_centos ~]#

文件的除了最后n个字节以外的内容

命令： **head -c -10 myFile **

root@VM_0_9_centos ~]# head -c 10 myFile

this is li[root@VM_0_9_centos ~]# head -c -10 myFile

this is line 1;

this is line 2;

this is line 3;

tihs is line 4;

this is line 5;

this is line 6;

this is line 7;

this is line 8;

this is line 9;

this is line 10;

this is line 11;

this is line 12;

this is line 13;

this is

[root@VM_0_9_centos ~]#

输出文件除了最后n行的全部内容

命令： **head -n -6 myFile **

[root@VM_0_9_centos ~]# head -n -10 myFile

this is line 1;

this is line 2;

this is line 3;

tihs is line 4;

[root@VM_0_9_centos ~]#

巴特西

每天一个linux命令：head(15)

head

格式

参数选项

实例

参考

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