1、 切换至root用户；
2、 如果Linux没有安装telnet服务需要先安装，安装过开通即可；
3、 检测telnet的rpm包是否安装[root@localhost ~]# rpm -qa telnettelnet-0.17-48.el6.x86_64[root@localhost ~]#
4、 安装telnet安装包：[root@localhost ~]# rpm -ivh xinetd-2.3.14-34.el6.x86_64.rpmwarning: xinetd-2.3.14-34.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEYPreparing... ########################################### [100%] package xinetd-2:2.3.14-39.el6_4.x86_64 (which is newer than xinetd-2:2.3.14-34.el6.x86_64) is already installed file /usr/sbin/xinetd from install of xinetd-2:2.3.14-34.el6.x86_64 conflicts with file from package xinetd-2:2.3.14-39.el6_4.x86_64[root@localhost ~]#
5、 修改telnet服务配置文件vi /etc/xinetd.d/telnetservice telnet{disable = yesflags = REUSEsocket_type = streamwait = nouser = rootserver = /usr/sbin/in.telnetdlog_on_failure += USERID}将disable=yes改为disable=no注意：安装telnet-server服务后，系统才会有/usr/sbin/in.telnetd文件
6、重启telnet服务[root@localhost root]#service xinetd restart
7、 测试是否可以，若果不行，检查防火墙是否关闭[root@localhost ~]# telnet 127.0.0.1Trying 127.0.0.1...Connected to 127.0.0.1.Escape character is '^]'.CentOS release 6.4 (Final)Kernel 2.6.32-358.el6.x86_64 on an x86_64login:
