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Clarify how to specify the contents of an ssh key for dokku #6006

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Jul 6, 2023
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Clarify how to specify the contents of an ssh key for dokku #6006

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22 changes: 21 additions & 1 deletion docs/deployment/user-management.md
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Expand Up @@ -58,7 +58,7 @@ dokku ssh-keys:list --format json admin

### Adding SSH keys

You can add your public key to Dokku with the `ssh-keys:add` command. The output will be the fingerprint of the SSH key:
You can add your public key to Dokku with the `ssh-keys:add` command. The path specified must contain your desired public ssh key contents and must exist on the server. Any special characters - such as `~` - are interpreted under the `dokku` user context. The output will be the fingerprint of the SSH key:

```shell
dokku ssh-keys:add KEY_NAME path/to/id_rsa.pub
Expand All @@ -72,6 +72,26 @@ SHA256:ABC123ABC123+abc123abc123Zabc123abcZ123abc

> `KEY_NAME` is a unique name which is used to identify public keys. Attempting to re-use a key name will result in an error. The SSH (Git) user is *always* `dokku`, as this is the system user that the `dokku` binary uses to perform all its actions.

Alternatively, you may pipe the contents of your ssh key via `cat` or `echo` into the `ssh-keys:add` command instead of specifying a path to the ssh key:

```shell
echo "$CONTENTS_OF_YOUR_PUBLIC_SSH_KEY_HERE" | dokku ssh-keys:add KEY_NAME
```

```
SHA256:ABC123ABC123+abc123abc123Zabc123abcZ123abc
```


```shell
cat path/to/id_rsa.pub | dokku ssh-keys:add KEY_NAME
```

```
SHA256:ABC123ABC123+abc123abc123Zabc123abcZ123abc
```


Admin users and root can add keys remotely by specifying the `dokku` bin on their `ssh` command:

```shell
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