SSH密钥生成指南

# Ed25519 — 推荐（现代、小巧、快速） ssh-keygen -t ed25519 -C "[email protected]" # RSA 4096 — 兼容旧系统 ssh-keygen -t rsa -b 4096 -C "[email protected]" # 指定输出文件 ssh-keygen -t ed25519 -f ~/.ssh/id_ed25519_work -C "work key"

# 启动 ssh-agent eval "$(ssh-agent -s)" # 添加密钥 ssh-add ~/.ssh/id_ed25519 # macOS — 添加到钥匙串 ssh-add --apple-use-keychain ~/.ssh/id_ed25519 # 列出已加载密钥 ssh-add -l

# 推荐方式 ssh-copy-id -i ~/.ssh/id_ed25519.pub user@server # 手动方式 cat ~/.ssh/id_ed25519.pub | ssh user@server "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys"

Host work HostName work.example.com User deploy IdentityFile ~/.ssh/id_ed25519_work AddKeysToAgent yes Host github.com User git IdentityFile ~/.ssh/id_ed25519 IdentitiesOnly yes