telnet

1. apt install xinetd telnetd  telnet  #安装xinet服务，telnet服务，telnet客户端

2. 创建文件/etc/xinetd.d/telnet，文件内容如下：

cat >>/etc/xinetd.d/telnet <EOF
service telnet
{
disable = no
flags = REUSE
socket_type = stream
wait = no
user = root
server = /usr/sbin/in.telnetd
server_args = -h
log_on_failure += USERID
}

EOF

systemctl restart xinetd.service

systemctl enable xinetd.service

 

配置root登陆

passwd root

grep pts /etc/securetty
pts/0
pts/1
pts/2