# User Management

> New as of 0.7.0

```
ssh-keys:add <name> [/path/to/key]                 # Add a new public key by pipe or path
ssh-keys:list [--format text|json] [<name>]        # List of all authorized Dokku public ssh keys
ssh-keys:remove [--fingerprint fingerprint|<name>] # Remove SSH public key by name
```

When pushing to Dokku, SSH key-based authorization is the preferred authentication method, for ease of use and increased security.

Users in Dokku are managed via the `~/dokku/.ssh/authorized_keys` file. It is *highly* recommended that you follow the steps below to manage users on a Dokku server.

> Users of older versions of Dokku may use the `sshcommand` binary to manage keys instead of the `ssh-keys` plugin. Please refer to the Dokku documentation for your version for more details.

## Usage

### Listing SSH keys

You can use the `ssh-keys:list` command to show all configured SSH keys. Any key added via the `dokku-installer` will be associated with the `admin` key name.

```shell
dokku ssh-keys:list
```

```
SHA256:ABC123ABC123+abc123abc123Zabc123abcZ123abc NAME="admin" SSHCOMMAND_ALLOWED_KEYS="no-agent-forwarding,no-user-rc,no-X11-forwarding,no-port-forwarding"
```

The output contains the following information:

- SSH Key Fingerprint.
- The `KEY_NAME`.
- A comma separated list of SSH options under the `SSHCOMMAND_ALLOWED_KEYS` name.

> New as of 0.20.2

The keys for a specific user may be listed by specifying a second argument to the `ssh-keys:list` command:

```shell
dokku ssh-keys:list admin
```

> 0.22.3

The output format may be specified via the `--format` flag. Supported values include `json` and `text`.

```shell
dokku ssh-keys:list --format json
```

This can additionally be used to filter to keys for a particular user:

```shell
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:

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

```
SHA256:ABC123ABC123+abc123abc123Zabc123abcZ123abc
```

`KEY_NAME` is the name you want to use to refer to this particular key. Including the word `admin` in the name will grant the user privileges to add additional keys remotely.

> `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.

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

```shell
cat ~/.ssh/id_rsa.pub | ssh root@dokku.me dokku ssh-keys:add KEY_NAME
```

If you are using the Vagrant installation, you can also use the `make vagrant-acl-add` target to add your public key to Dokku (it will use your host username as the `USER`):

```shell
cat ~/.ssh/id_rsa.pub | make vagrant-acl-add
```

### Removing SSH keys

As key names are unique, they can be used to remove a public SSH key.

```shell
dokku ssh-keys:remove KEY_NAME
```

An SSH Key can also be removed by fingerprint.

```shell
dokku ssh-keys:remove --fingerprint FINGERPRINT
```

## Scoping commands to specific users

Support for scoping commands to specific users can be added through plugins that take advantage of the [user-auth](/docs/development/plugin-triggers.md#user-auth) plugin trigger to handle command authorization.
See also the list of [community-provided plugins](/docs/community/plugins.md).

## Granting other Unix user accounts Dokku access

Any Unix user account which belongs to the `sudo` Unix group can run Dokku.  However, you may want to give them Dokku access but not full sudo privileges.

To allow other Unix user accounts to be able to run Dokku commands, without giving them full sudo access, modify your sudoers configuration.

Use `visudo /etc/sudoers.d/dokku-users`, or `visudo /etc/sudoers` to add the following line:

```
%dokku ALL=(ALL:ALL) NOPASSWD:SETENV: /usr/bin/dokku
```

