Ubuntu Linux系统开启TELNET服务的方法

　　1. sudo apt-get install xinetd telnetd

　　2. 安装成功后，系统也会有相应提示（好象7.10才有，6.10就没看到）

　　sudo vi /etc/inetd.conf并加入以下一行

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

　　3. sudo 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

　　4. sudo 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。