原文地址：http://www.cnblogs.com/zhongshengzhen/
1、检查是否已经安装telnet
[root@localhost ~]# rpm -qa | grep telnet
2、安装telnet及telnet-server
[root@localhost ~]# yum install telnet
[root@localhost ~]# yum install telnet-server
3、因为装好telnet服务之后，默认是不开启服务的，下面我们需要修改文件来开启服务。
[root@localhost ~]# vi /etc/xinetd.d/telnet
修改 disable = yes 为 disable = no
service telnet
{
flags = REUSE
socket_type = stream
wait = no
user = root
server = /usr/sbin/in.telnetd
log_on_failure += USERID
disable = no
}
{
flags = REUSE
socket_type = stream
wait = no
user = root
server = /usr/sbin/in.telnetd
log_on_failure += USERID
disable = no
}
4、需要激活xinetd服务
[root@localhost ~]# service xinetd restart
Stopping xinetd: [FAILED]
Starting xinetd: [ OK ]
[root@localhost ~]# service xinetd restart
Stopping xinetd: [ OK ]
Starting xinetd: [ OK ]
Stopping xinetd: [FAILED]
Starting xinetd: [ OK ]
[root@localhost ~]# service xinetd restart
Stopping xinetd: [ OK ]
Starting xinetd: [ OK ]
5、需要测试telnet是否成功开启