# Docker not found
**URL:** https://meta.discourse.org/t/docker-not-found/288799
**Category:** Self-hosting
**Created:** [December 15, 2023, 11:21am UTC](https://meta.discourse.org/t/docker-not-found/288799 "2023-12-15T11:21:21Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@dooooove](https://meta.discourse.org/u/dooooove)
#### Post date: [December 15, 2023, 11:21am UTC](https://meta.discourse.org/t/docker-not-found/288799/1 "2023-12-15T11:21:21Z")
I prepared the rebuild app after installing the plugin, but strangely, it failed. Here is the code: (Sorry, this issue may be foolish, I am a complete beginner)
```plaintext
ubuntu@VM-4-2-ubuntu:/var/discourse$ ./launcher rebuild app
Cannot connect to the docker daemon - verify it is running and you have access
ubuntu@VM-4-2-ubuntu:/var/discourse$ docker-machine start default
Command 'docker-machine' not found, but can be installed with:
sudo snap install docker
```
I have tried and searched for some methods before, but none of them were effective.
---
### Author:  [@pfaffman](https://meta.discourse.org/u/pfaffman)
#### Post date: [December 15, 2023, 11:57am UTC](https://meta.discourse.org/t/docker-not-found/288799/2 "2023-12-15T11:57:46Z")
It looks like docker is not installed. You could usual it the way suggested or use the way suggested in the [standard install](https://meta.discourse.org/t/142537?silent=true) instructions.
---
### Author:  [@dooooove](https://meta.discourse.org/u/dooooove)
#### Post date: [December 15, 2023, 2:12pm UTC](https://meta.discourse.org/t/docker-not-found/288799/3 "2023-12-15T14:12:12Z")
thank you so much,I will try again. 😃