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System Configuration ubuntudebiancentos beginner

Generate SSH Key Pair

Generate Ed25519 SSH key pair

Overview

Generate Ed25519 SSH key pair

Commands

ssh-keygen -t ed25519 -C "zshell@$(hostname)" -f ~/.ssh/id_ed25519 -N ""

Use Cases

Git/GitHub authentication, passwordless SSH login, automated deployment.

Prerequisites

OpenSSH is installed.

FAQ

  • Permission error → chmod 600 ~/.ssh/id_ed25519
  • Upload public key → ssh-copy-id user@host
  • Harden SSH
  • rsync Incremental Backup