ssh无法登陆：
使用最新putty
vi /etc/ssh/sshd_config
#PermitRootLogin without-password 改为 PermitRootLogin yes
service sshd restart
https://blog.csdn.net/fanchw/article/details/117555389
设置网络配置文件：
vi /etc/NetworkManager/system-connections/ens33.nmconnection
https://www.cnblogs.com/awakenedy/articles/16775407.html