GCP provides us with several ways to log in to the cloud server, but most people still like to get the IP, putty or xshell, which feels more convenient. For example, I... Record how to modify it below It can log in directly with putty. 
 First click on the triangle behind the connection and select Open in browser. 
 
 Then a new browser window is opened, the system has automatically logged in, we switch to root
 sudo -i
 and then edit the ssh configuration file
 vi /etc/ssh/sshd_config
 Find the following content and modify it 
 PermitRootLogin yes
 PasswordAuthentication yes
 (change no to yes, remove # if there is a comment in front of it)
 Finally , restart ssh
 service sshd restart
 OK, next we change the root password 
 passwd root
 Then we can try to log in locally using ssh tools such as putty directly.
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