刚安装的ubuntu12.04还没有telnet功能，需要配置一下

我主要是想让ubuntu12.04开启telnet服务做服务器

安装openbsd-inetd:

#sudo apt-get install openbsd-inetd

安装telnetd:

#sudo apt-get install telnetd

在etc/inetd.conf文件中可以看到这一行内容： telnet stream tcp nowait root /usr/sbin/tcpd /usr/sbin/in.telnetd 如果没有这一行内容，就手动加上

重启openbsd-inetd

#/etc/init.d/openbsd-inetd restart

查看telnet运行状态

#netstat -a | grep telnet 输出： tcp 0 0 *:telnet *:* LISTEN

在windows的命令行中输入：

telnet 192.168.1.8（我的linux的IP地址） 按照提示输入用户名和密码进入（非root用户）

效果如下：

Ubuntu 12.04 ubuntu login: kevin

Password: Linux ubuntu 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19

20:34:50 UTC 20 10 i686 GNU/Linux Ubuntu 12.04 Welcome to Ubuntu! * Documentation:  https://help.ubuntu.com/

New release 'natty' available. Run 'do-release-upgrade' to upgrade to it.

The programs included with the Ubuntu system are free software; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law.