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title: UFO_ENV_EXTRA
nav_order: 21
---
<div class="video-box"><div class="video-container"><iframe src="https://www.youtube.com/embed/UVQuwQGToYE" frameborder="0" allowfullscreen=""></iframe></div></div>
Ufo has an concept of extra environments. This is controlled by the `UFO_ENV_EXTRA` variable. By setting `UFO_ENV_EXTRA` you can create additional identical ECS services or environments.
ufo ship demo-web # creates a demo-web ecs service
UFO_ENV_EXTRA=2 ufo ship demo-web # creates a demo-web-2 ecs service
The `UFO_ENV_EXTRA` can also be set with `ufo current` so you do not have to type it over.
ufo current --env-extra 1
The precedence:
1. UFO_ENV_EXTRA - takes highest precedence
2. `.ufo/current` env-extra setting - takes lower precedence
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Version data entries
7 entries across 7 versions & 1 rubygems