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How to setup a RSA key in your Linux server
First, generate the key :
– Download PuTTYgen.
– You can select the encryption (1024 bits, 2048 or 4096 bits).
– Launch the program, click generate. You have to move the mouse on the gray surface.
– Save the public key (id_rsa.pub).
– Enter a key passphrase. You will have to enter it each time (like a password). It will protect the use of the private key.
– Save the private key (privatekey.ppk).
Copy the public key in your server :
On PuTTYgen, copy the public key (starting with ssh-rsa), and paste it into your server authorized_keys.
Save.
Change the permissions :
In PuTTY, go to the SSH > Auth :
Browse the private key.
Save the session in the main tab.
Nexs steps :
– Disable the password access with root login for SSH.
– Use FileZilla and RSA key.
– Download PuTTYgen.
– You can select the encryption (1024 bits, 2048 or 4096 bits).
– Launch the program, click generate. You have to move the mouse on the gray surface.
– Save the public key (id_rsa.pub).
– Enter a key passphrase. You will have to enter it each time (like a password). It will protect the use of the private key.
– Save the private key (privatekey.ppk).
Copy the public key in your server :
nano ~/.ssh/authorized_keys
On PuTTYgen, copy the public key (starting with ssh-rsa), and paste it into your server authorized_keys.
Save.
Change the permissions :
chmod 600 ~/.ssh/authorized_keys
In PuTTY, go to the SSH > Auth :
Browse the private key.
Save the session in the main tab.
Nexs steps :
– Disable the password access with root login for SSH.
– Use FileZilla and RSA key.
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