# Docker docs - Get started Part 7: invalid reference format https://docs.docker.com/get-started/07\_multi\_container/ **URL:** \ **Category:** Docker Hub\ **Tags:** build\ **Created:** [December 29, 2020, 4:56pm UTC](https://forums.docker.com/t/docker-docs-get-started-part-7-invalid-reference-format-https-docs-docker-com-get-started-07-multi-container/102403 "2020-12-29T16:56:29Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![franc001](https://avatars.discourse-cdn.com/v4/letter/f/85f322/32.png) [@franc001](https://forums.docker.com/u/franc001)\ **Post date:** [December 29, 2020, 4:56pm UTC](https://forums.docker.com/t/docker-docs-get-started-part-7-invalid-reference-format-https-docs-docker-com-get-started-07-multi-container/102403/1 "2020-12-29T16:56:29Z")
Trying to run our App with MySQL with the specified command copied from the manual in [https://docs.docker.com/get-started/07\_multi\_container/](https://docs.docker.com/get-started/07_multi_container/) (section ‘Running our App with MySQL’, step 1): ~ sudo docker run -dp 3000:3000 \ -w /app -v “(pwd):/app” \ --network todo-app \ -e MYSQL\_HOST=mysql \ -e MYSQL\_USER=root \ -e MYSQL\_PASSWORD=secret \ -e MYSQL\_DB=todos \ node:12-alpine \ sh -c “yarn install && yarn run dev” I get this error: docker: invalid reference format. See ‘docker run --help’. I run docker in ubuntu 18.04 My docker version is 20.10.1 (both client and server). Could someone give my an indication for resolution? ---
**Author:** ![franc001](https://avatars.discourse-cdn.com/v4/letter/f/85f322/32.png) [@franc001](https://forums.docker.com/u/franc001)\ **Post date:** [December 30, 2020, 5:56pm UTC](https://forums.docker.com/t/docker-docs-get-started-part-7-invalid-reference-format-https-docs-docker-com-get-started-07-multi-container/102403/2 "2020-12-30T17:56:53Z")
Typed in command instead of copying it. Then it worked.