Linux SSH RSA authentication method login need to clarify the problem

A few points that beginners are apt to confuse:

1. The key pair generated by Ssh-keygen is independent of which user was generated.

2. Which user uses the key pair, the appropriate permissions and the owner of the user should be granted. Permissions must be authorized to authorize the correct

3. The key password when generating the key pair can be empty, press the ENTER key directly

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Linux SSH RSA authentication method login need to clarify the problem