Turn off the ssh password and log in.

0. Check whether ssh-keygen is installed.

If the above error occurs, you need to install ssh-key from 1 Otherwise, start at 2. Create an authorization file.

1. install ssh-key.

Install the RSA key, just enter it all the way.

2. Create an authorization file

Write the contents of local id_rsa.pub to authorized_keys. Note: it is local, not server's.

3. Password-free login test

Theoretically, it just landed.

1. Modify the configuration file

Modify the content, generally has been set. Just modify it, not add it.

2. Restart the ssh service

Ok, this will prevent others from cracking the password.

Turn off SSH traditional password login mode.