1 环境

  centos 7

  yum已配置好

  网络连接正常

2 检查是否已安装相关软件

  rpm -qa|grep telnet

3 安装相关组件

  yum install xinetd

  yum install telnet

  yum install telnet-server

4 设置telnet自启动

  systemctl enable telnet.socket

  systemctl start telnet.socket

  systemctl enable xinetd

  systemctl start xinetd

5 关闭防火墙(7默认没有iptables,默认是firewall防火墙)

  systemctl stop firewalld.service

  systemctl disable firewalld.service

6 允许root用户登录

  vi /etc/securetty

  末尾添加两行:

    pts/0

    pts/1

done!