head [option]... [file]...
[功能]
列印檔案的開頭部分。
[描述]
預設head命令列印其相應檔案的開頭10行。
[舉例]
*檢視的測試檔案內容：
[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
*列印檔案的開始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
*列印檔案的開始12個位元組：
[root@lv-k samba]# head -c 12 smb.conf
[global]
wor
*列印檔案的除了最後12個位元組以外的內容：
[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
*列印檔案的頭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.
*列印除了最後20行的內容：
[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]
這裡，我們可以看出來，使用"-"字首的數字表示指明不會顯示相應大小的內容。
[其它]
更多的資訊，可以參考"info head".
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