# Docker: 'system' is not a docker command. Unable to run ./launcher cleanup

**URL:** https://meta.discourse.org/t/docker-system-is-not-a-docker-command-unable-to-run-launcher-cleanup/65783
**Category:** Self-hosting
**Created:** [7 Julho , 2017 04:41 UTC](https://meta.discourse.org/t/docker-system-is-not-a-docker-command-unable-to-run-launcher-cleanup/65783 "2017-07-07T04:41:39Z")
**Posts on this page:** 1
**Showing post:** 8

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### Author: ![Falco](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/falco/32/179432_2.png) [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [10 Julho , 2017 19:59 UTC](https://meta.discourse.org/t/docker-system-is-not-a-docker-command-unable-to-run-launcher-cleanup/65783/8 "2017-07-10T19:59:21Z")

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Are you running a recent Docker, version 17.x ?

You can add `--skip-prereqs` to ignore any checks too.

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_[View the full topic](https://meta.discourse.org/t/docker-system-is-not-a-docker-command-unable-to-run-launcher-cleanup/65783)._