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，如果开启代表成功了
原文：https://www.cnblogs.com/cx850116/p/9957278.html