Centos7-安装telnet服务

yum -y install telnet-server.x86_64
yum -y install telnet.x86_64
yum -y install xinetd.x86_64

设置开机自启：

systemctl enable xinetd.service
systemctl enable telnet.socket

开启service：

systemctl start telnet.socket
systemctl start xinetd

netstat -nltp看一下是否开启了23端口，若是开启表明成功了