UNIX网络编程学习（1）--开启ubuntu daytime服务

命令操作依次是：

sudo apt-get install xinetd

fupeng@ubuntu:/etc$ cd xinetd.d
fupeng@ubuntu:/etc/xinetd.d$ ls
chargen  daytime  discard  echo  time
fupeng@ubuntu:/etc/xinetd.d$ vi daytime
fupeng@ubuntu:/etc/xinetd.d$ gedit daytime
fupeng@ubuntu:/etc/xinetd.d$ chmod 777 daytime
chmod: changing permissions of `daytime': Operation not permitted
fupeng@ubuntu:/etc/xinetd.d$ sudo chmod 777 daytime
fupeng@ubuntu:/etc/xinetd.d$ gedit daytime
fupeng@ubuntu:/etc/xinetd.d$ sudo /etc/init.d/xinetd start
 * Starting internet superserver xinetd                                  [fail] 
fupeng@ubuntu:/etc/xinetd.d$ sudo /etc/init.d/xinetd start
[sudo] password for fupeng: 
 * Starting internet superserver xinetd                                  [fail] 
fupeng@ubuntu:/etc/xinetd.d$ sudo /etc/init.d/xinetd restart
 * Stopping internet superserver xinetd                                  [ OK ] 
 * Starting internet superserver xinetd                                  [ OK ] 
fupeng@ubuntu:/etc/xinetd.d$ 

fupeng@ubuntu:/etc/xinetd.d$ gedit daytime  

是将此文件中的两个 disable 的值 yes 改为 no  。

开启后，运行UNIX网络编程的第一个例子就OK了。