开启telnet远程登录

部署软件

 yum install telnet-server telnet

编辑配置文件

vim /etc/xinetd.d/telnet
service telnet
{
    disable = no
    flags = REUSE
    socket_type = stream
    wait = no
    user = root
    server = /usr/sbin/in.telnetd
    log_on_failure += USERID
}

启动服务

systemctl enable telnet.socket && systemctl start telnet.socket

创建普通登录用户

adduser username
passwd username

登录链接

telnet <服务器IP地址>
Connecting to 192.168.4.10:23...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.

Kernel 3.10.0-862.el7.x86_64 on an x86_64
localhost login:
Password: