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 ghostwuhow are youfile thank youfile thank youfile thank youfile thank youghostwu@dev:~/linux/more$ head -2 ghostwu.txt this is ghostwughostwu@dev:~/linux/more$ cat ghostwu.txt | head -4this is ghostwuhow are youghostwu@dev:~/linux/more$ head -c 10 ghostwu.txt this is ghghostwu@dev:~/linux/more$ cat -n ghostwu.txt | head     1    this is ghostwu     2         3         4    how are you     5         6         7    file thank you     8    file thank you     9    file thank you    10    file thank youghostwu@dev:~/linux/more$