SSH key authentication and how do I set it up on a VPS के हो?
SSH key authentication uses asymmetric cryptography instead of passwords — your private key (stays on your machine) proves identity to the server which holds your public key. Brute-force attacks are mathematically infeasible against proper SSH keys (4096-bit RSA or Ed25519). Setup process: 1) Generate key pair on your local machine: ssh-keygen -t ed25519 -C "[email protected]". 2) Copy public key to VPS: ssh-copy-id -i ~/.ssh/id_ed25519.pub root@your-vps-ip. 3) Test key login: ssh -i ~/.ssh/id_ed25519 root@your-vps-ip. 4) After confirming key login works, disable password authentication: ...
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