1,检查是否安装 telnet-server和xinetd
rpm -qa telnet-server
rpm -qa xinetd
2,如果没有安装过就安装 查找yum
yum list |grep telnet
yum list |grep xinetd
3,执行安装语句
yum install telnet-server telnet xinetd -y
4,设置开机自启:
systemctl enable telnet.socket
systemctl enable xinetd.service
5,开启service:
systemctl start telnet.socket
systemctl start xinetd.service
6.设置root可以远程登录
mv /etc/securetty /etc/securetty.bak