docker-tidy/docs/content/usage/_index.md

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---
title: Usage
---
{{< toc >}}
## Garbage Collector
Remove old docker containers and docker images.
`docker-tidy gc` will remove stopped containers and unused images that are older
than \"max age\". Running containers, and images which are used by a
container are never removed.
Maximum age can be specificied with any format supported by
[pytimeparse](https://github.com/wroberts/pytimeparse).
__Example:__
```Shell
docker-tidy gc --max-container-age 3days --max-image-age 30days
```
### Prevent images from being removed
`docker-tidy gc` supports an image exclude list. If you have images that you\'d
like to keep around forever you can use the exclude list to prevent them
from being removed.
```Shell
--exclude-image
Never remove images with this tag. May be specified more than once.
```
### Prevent containers and associated images from being removed
`docker-tidy gc` also supports a container exclude list based on labels. If there
are stopped containers that you\'d like to keep, then you can check the
labels to prevent them from being removed.
```Shell
--exclude-container-label
Never remove containers that have the label key=value. =value can be
omitted and in that case only the key is checked. May be specified
more than once.
```
## Autostop
Stop containers that have been running for too long.
`docker-tidy stop` will `docker stop` containers where the container name starts
with [\--prefix]{.title-ref} and/or it has been running for longer than
[\--max-run-time]{.title-ref}.
If no prefix is set, __all__ containers matching the `max-run-time` will be stopped!
__Example:__
```Shell
docker-tidy stop --max-run-time 2days --prefix "projectprefix_"
```