Linux常用基本命令(head)

head命令

作用：显示文件的头部内容，默认显示前面１０行

格式：

head [option] [file]

-n <行数>

-c <字节>

ghostwu@dev:~/linux/more$ head ghostwu.txt
this is ghostwu

how are you

file thank you
file thank you
file thank you
file thank you
ghostwu@dev:~/linux/more$ head - ghostwu.txt
this is ghostwu

ghostwu@dev:~/linux/more$ cat ghostwu.txt | head -
this is ghostwu

how are you
ghostwu@dev:~/linux/more$ head -c  ghostwu.txt
this is ghghostwu@dev:~/linux/more$ cat -n ghostwu.txt | head
         this is ghostwu

         how are you

         file thank you
         file thank you
         file thank you
        file thank you
ghostwu@dev:~/linux/more$