Generate the SSH key pair on your local machine (the one you want to connect from):
ssh-keygen -t rsa -b 4096 -f ~/.ssh/username
-t rsa: Specifies the RSA algorithm (you can also use ed25519 for better security).-b 4096: Sets the key size (4096 bits for RSA).-f ~/.ssh/username: This option lets you set the filename and path for the key. Here, it will save the private key as ~/.ssh/username and the public key as ~/.ssh/username.pub.
Save the key files:
- You’ll be prompted to choose a file location for the keys. Press
Enter to accept the default path (~/.ssh/id_rsa).
- You’ll then be asked to set a passphrase. Press
Enter if you want passwordless login; otherwise, enter a passphrase for extra security.
you can manually copy the key:
scp ~/.ssh/username.pub username@server_ip_address:/home/username/.ssh/authorized_keys
