Configure ssh authentication in ubuntu

Configure ssh authentication in ubuntu-Linux Enterprise Application-Linux server application information. For more information, see. It is very simple. public key is generated on the local machine first.

Ssh-keygen

Generate by default. If everything is normal, two files should be generated:

Id_rsa
Id_rsa.pub

One is the private key and the other is the public key. The public key file id_rsa.pub is copied to the server and then imported to the user who needs to log on.

For example, if you use the root user to log on to the ssh server, you can import the/root/. ssh directory.

Cat id_rsa.pub> authorized_keys

In this way, you can log on to ssh without entering the password.

Ssh root @ ssh-server