1.安装
ubuntu 9.04默认没有安装xinetd,要安装telnet需要先安装xinet
#apt-get install xinetd telnetd
2.配置
相关配置文件：/etc/xinet.conf和/etc/xinetd.d/*
root@liceven-laptop:/etc# cat xinetd.conf
# 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
#插入以下部分，不然无法启动xinetd,也就无法启动telnet
#add the following lines on 2009.9.4
instances = 60
log_type = SYSLOG authpriv
log_on_success = HOST PID
log_on_failure = HOST
cps = 25 30
}
includedir /etc/xinetd.d
编辑/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
}
3.重启xinetd
＃/etc/init.d/xinetd restart
注：
1）telnet用明文传送信息，很不安全，仅在LAN内使用。
2）win环境下的telnet工具推荐使用pietty，有很好的中文支持。
