Ubuntu 12.04 Telnet服務設定

剛安裝的Ubuntu 12.04還沒有telnet功能，需要設定一下。我主要是想讓Ubuntu 12.04開啟telnet服務做伺服器。

安裝openbsd-inetd:
#sudo apt-get install openbsd-inetd

安裝telnetd:
#sudo apt-get install telnetd

在etc/inetd.conf檔案中可以看到這一行內容：
telnet stream tcp nowait root /usr/sbin/tcpd /usr/sbin/in.telnetd
如果沒有這一行內容，就手動加上

重新啟動openbsd-inetd
#/etc/init.d/openbsd-inetd restart

檢視telnet執行狀態
#netstat -a | grep telnet
輸出： tcp 0 0 *:telnet *:* LISTEN

在windows的命令列中輸入：telnet 192.168.1.8（我的linux的IP地址）
按照提示輸入使用者名稱和密碼進入（非root使用者）

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.

Ubuntu下安裝建立Telnet 伺服器 http://www.linuxidc.com/Linux/2010-03/25150.htm