Linux命令学习手册-head命令

head [OPTION]... [FILE]... 

[功能] 

打印文件的开头部分。 

[描述] 

默认head命令打印其相应文件的开头10行。 

[举例] 

*查看的测试文件内容： 

[root@lv-k samba]# cat smb.conf 

[global] 

workgroup = MY_GROUP 

server string = "MySamba" 

netbios name = "MySamba Server ip" 

hosts allow = 127. 192.168.12. 192.168.13. 10.1.2. 

security = share 

[public1] 

path = /home/mysamba 

public = yes 

writable = yes 

[public2] 

path = /root/mysamba 

public = yes 

writable = yes 

browseable = yes 

hosts allow = 10.1.2.213 10.1.2.217 

[public3] 

path = /tmp/mysamba 

public = yes 

writable = yes 

browseable = yes 

security = user 

valid users = quietheart lv-k 

create mask = 0700 

directory mask = 0700 

*打印文件的开始10行： 

[root@lv-k samba]# head smb.conf 

[global] 

workgroup = MY_GROUP 

server string = "MySamba" 

netbios name = "MySamba Server ip" 

hosts allow = 127. 192.168.12. 192.168.13. 10.1.2. 

security = share 

[public1] 

path = /home/mysamba 

public = yes 

*打印文件的开始12个字节： 

[root@lv-k samba]# head -c 12 smb.conf 

[global] 

wor 

*打印文件的除了最后12个字节以外的内容： 

[root@lv-k samba]# head -c -12 smb.conf 

[global] 

workgroup = MY_GROUP 

server string = "MySamba" 

netbios name = "MySamba Server ip" 

hosts allow = 127. 192.168.12. 192.168.13. 10.1.2. 

security = share 

[public1] 

path = /home/mysamba 

public = yes 

writable = yes 

[public2] 

path = /root/mysamba 

public = yes 

writable = yes 

browseable = yes 

hosts allow = 10.1.2.213 10.1.2.217 

[public3] 

path = /tmp/mysamba 

public = yes 

writable = yes 

browseable = yes 

security = user 

valid users = quietheart lv-k 

create mask = 0700 

directory 

*打印文件的头5行： 

[root@lv-k samba]# head -n 5 smb.conf 

[global] 

workgroup = MY_GROUP 

server string = "MySamba" 

netbios name = "MySamba Server ip" 

hosts allow = 127. 192.168.12. 192.168.13. 10.1.2. 

*打印除了最后20行的内容： 

[root@lv-k samba]# head -n -20 smb.conf 

[global] 

workgroup = MY_GROUP 

server string = "MySamba" 

netbios name = "MySamba Server ip" 

hosts allow = 127. 192.168.12. 192.168.13. 10.1.2. 

security = share 

[public1] 

这里，我们可以看出来，使用"-"前缀的数字表示指明不会显示相应大小的内容。 

[其它] 

更多的信息，可以参考"info head".