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---
title: "swarm unlock-key"
description: "The swarm unlock-keycommand description and usage"
keywords: "swarm, unlock-key"
---
# swarm unlock-key
```markdown
Usage: docker swarm unlock-key [OPTIONS]
Manage the unlock key
Options:
--help Print usage
-q, --quiet Only display token
--rotate Rotate unlock key
```
## Description
An unlock key is a secret key needed to unlock a manager after its Docker daemon
restarts. These keys are only used when the autolock feature is enabled for the
swarm.
You can view or rotate the unlock key using `swarm unlock-key`. To view the key,
run the `docker swarm unlock-key` command without any arguments:
> **Note**
>
> This is a cluster management command, and must be executed on a swarm
> manager node. To learn about managers and workers, refer to the
> [Swarm mode section](https://docs.docker.com/engine/swarm/) in the
> documentation.
## Examples
```console
$ docker swarm unlock-key
To unlock a swarm manager after it restarts, run the `docker swarm unlock`
command and provide the following key:
SWMKEY-1-fySn8TY4w5lKcWcJPIpKufejh9hxx5KYwx6XZigx3Q4
Please remember to store this key in a password manager, since without it you
will not be able to restart the manager.
```
Use the `--rotate` flag to rotate the unlock key to a new, randomly-generated
key:
```console
$ docker swarm unlock-key --rotate
Successfully rotated manager unlock key.
To unlock a swarm manager after it restarts, run the `docker swarm unlock`
command and provide the following key:
SWMKEY-1-7c37Cc8654o6p38HnroywCi19pllOnGtbdZEgtKxZu8
Please remember to store this key in a password manager, since without it you
will not be able to restart the manager.
```
The `-q` (or `--quiet`) flag only prints the key:
```console
$ docker swarm unlock-key -q
SWMKEY-1-7c37Cc8654o6p38HnroywCi19pllOnGtbdZEgtKxZu8
```
### `--rotate`
This flag rotates the unlock key, replacing it with a new randomly-generated
key. The old unlock key will no longer be accepted.
### `--quiet`
Only print the unlock key, without instructions.
## Related commands
* [swarm ca](swarm_ca.md)
* [swarm init](swarm_init.md)
* [swarm join](swarm_join.md)
* [swarm join-token](swarm_join-token.md)
* [swarm leave](swarm_leave.md)
* [swarm unlock](swarm_unlock.md)
* [swarm update](swarm_update.md)
|
