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