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//平台：友坚恒天UT-S3C6410开发板

1.关于telnet命令的相关信息

[root@urbetter /]# telnet --help

BusyBox v1.13.3 (2009-03-25 15:48:45 CST) multi-call binary

Usage: telnet [-a] [-l USER] HOST [PORT]

Connect to telnet server

Options:

        -a      Automatic login with $USER variable

        -l USER Automatic login as USER

2.开发板telnet登录到其他提供了telnet服务器的主机

---确认开发板的ip地址，确认开发板能连接Internet

   ifconfig

   ping 内网的ip     ；ping 外网的ip

---设置路由ip：route add default gw 192.168.1.1

---登录：telnet 202.112.7.137

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3.开发板设置好网络，登录Internet

---设置网关:route add default gw 192.168.1.1(根据实际情况设定)

---确认连通Internet:ping 202.112.17.137

---设置域名解析服务器:

   查看你pc机上的DNS服务器的ip地址 202.96.128.96

   vim /etc/resolv.conf  添加 nameserver 202.96.128.96

   或者rm /etc/resolv.conf ;touch /etc/resolv.conf;

       echo nameserver 202.96.128.96 >> /etc/resolv.conf

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4.开发板登录Linux主机

4.1Linux主机安装telnet服务

   sudo apt-get install xinetd telnetd

   修改配置

　 sudo vi /etc/inetd.conf并加入以下一行

   telnet stream tcp nowait telnetd /usr/sbin/tcpd  /usr/sbin/in.telnetd

   4.2sudo vi /etc/xinetd.conf并加入以下内容：

# Simple configuration file for xinetd

#

# Some defaults, and include /etc/xinetd.d/

defaults

{

# Please note that you need a log_type line to be able to use log_on_success

# and log_on_failure. The default is the following :

# log_type = SYSLOG daemon info

instances = 60

log_type = SYSLOG authpriv

log_on_success = HOST PID

log_on_failure = HOST

cps = 25 30

}

includedir /etc/xinetd.d

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4.3sudo vi /etc/xinetd.d/telnet并加入以下内容：

# default: on

# description: The telnet server serves telnet sessions; it uses

# unencrypted username/password pairs for authentication.

service telnet

{

disable = no

flags = REUSE

socket_type = stream

wait = no

user = root

server = /usr/sbin/in.telnetd

log_on_failure += USERID

}

5. 重启机器或重启网络服务sudo /etc/init.d/xinetd restart

6. 使用TELNET客户端远程登录；

   ifconfig -a   显示本机地址。

来源：友坚恒天技术中心http://www.urbetter.com/index.asp