Create an SSH key

An SSH key lets you log in to your GPU securely without a password. It has two halves: a private key that never leaves your computer, and a public key that you give to us. Add the public key once and every GPU you rent accepts it.

If you already have a key, you don't need a new one: skip to Find your public key.

macOS and Linux

Open Terminal.
Run:
```
ssh-keygen -t ed25519 -C "my-laptop"
```
Press Enter to save it in the default place, ~/.ssh/id_ed25519. If it asks to overwrite an existing key, answer n: you already have one.
Type a passphrase to protect the key (recommended), or press Enter twice for none.

Windows

Windows 10 and 11 include SSH.

Open PowerShell (press Start and type "PowerShell").
Run:
```
ssh-keygen -t ed25519 -C "my-laptop"
```
Press Enter to save it in the default place, C:\Users\<you>\.ssh\id_ed25519.
Type a passphrase (recommended), or press Enter twice for none.

If PowerShell says ssh-keygen isn't recognised, add it under Settings → System → Optional features → OpenSSH Client, then try again.

Find your public key

The public key is the file ending in .pub, next to the private key. Print it with:

System	Command
macOS, Linux	`cat ~/.ssh/id_ed25519.pub`
Windows (PowerShell)	`Get-Content $env:USERPROFILE\.ssh\id_ed25519.pub`

It is one line that starts with ssh-ed25519 (or ssh-rsa for an older key), for example ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAA… my-laptop. Copy the whole line.

Paste the public key only. Never paste or share your private key: the file with no .pub ending, which starts -----BEGIN OPENSSH PRIVATE KEY-----. Anyone who has it can log in as you.

Add it to Green Compute

On the GPU Rental page, in the SSH Keys box, give the key a name you'll recognise, paste the line into Public key and choose Add Key. Over the API, put it in metadata.ssh_public_keys when you create a workload (see the GPU rental reference).

A key applies to GPUs you rent after adding it. A pod that is already running keeps the keys it started with.

Connect

When your rental is ready, My Rentals shows the exact command, for example:

ssh root@203.0.113.7 -p 40123

If your key isn't in the default place, add -i and its path: ssh -i ~/keys/work_key root@203.0.113.7 -p 40123.

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