ssh4

ssh4 is a small npm-based CLI for passwordless SSH setup.

Install

npm install -g @yilinyo/ssh4

Usage

Generate a key pair:

ssh4 client generate prod

Add the public key to a server:

ssh4 host add prod --host example.com --user root --test

After setup, connect directly with:

ssh prod

List saved aliases:

ssh4 list

Remove a saved alias:

ssh4 rm prod

If you want to choose a custom key path:

ssh4 client generate prod --path ~/.ssh/ssh4/prod/id_ed25519
ssh4 host add prod --user ubuntu

Notes

• ssh4 client genrate is accepted as a typo-friendly alias for generate.
• The tool uses ssh-keygen and ssh from your system.
• If ssh-copy-id exists on your machine, ssh4 host add will use it automatically.
• Each alias gets its own key directory under ~/.ssh/ssh4/<alias>/.
• ssh4 host add requires ssh4 client generate <alias> to run first so the public key exists.
• ssh4 host add <alias> --host ... writes host info into the alias folder on first use, then reuses it later without --host.
• ssh4 host add defaults to root if you do not pass --user, but the CLI will tell you to pass it explicitly.
• ssh4 host add also updates ~/.ssh/config so ssh <alias> can connect directly.
• ssh4 list scans ~/.ssh/ssh4/ directly, and ssh4 rm <alias> removes one alias plus its local key directory.