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This article mainly explains the "SSH certificate how to let Putty password-free login Linux", the article explains the content is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "SSH certificate how to let Putty password-free login to Linux" it!

1. Use the PuTTY SSH key generation tool puttygen.exe to generate the key.

The key type and number of bits generated are OK,SSH-2 RSA,1024 bits by default.

When generating a key, you need to move your mouse over a blank area to generate random data.

Click Save Private key (password protection may not be set), do not generate public key, because the public key OpenSSH generated by PUTTY cannot be used.

Log in to the remote Linux server / VPS with 2.SSH password and create .ssh / authorized_keys.

Vim / .ssh/authorized_keys

Paste the public key content generated by puttygen.exe to ~ / .ssh/authorized_keys.

Note: the public key content is shown in the public key (P) approved by OpenSSH: below this line of characters.

As to why the file name is authorized_keys, you can find the following two lines in / etc/ssh/sshd_config

# PubkeyAuthentication yes

# AuthorizedKeysFile .ssh / authorized_keys

3. Log in to your Linux server / VPS with your SSH certificate

Putty → session: fill in the server IP

Putty → connection → data: fill in the automatic login user name

Putty → connection → SSH → Authentication: select the authenticated private key file

Go back to the Putty → session: save the session, fill in a name and save it. Next time, you can log in directly by double-clicking the name.

4. For security you need to cancel the password authentication method of SSH.

Vim / etc/ssh/sshd_config

Add the following line

PasswordAuthentication no

Restart the SSH service

Service sshd restart

Thank you for your reading, the above is the "SSH certificate how to let Putty password-free login Linux" content, after the study of this article, I believe you on the SSH certificate how to let Putty password-free login Linux this problem has a deeper understanding, the specific use of the situation also needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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