# Runner flags

The `local:docker`runner accepts flags on the command-line which can modify its behavior. The chart below shows available options:

In order to pass a command-line flag, add the option `--run-cfg` followed by any of the following options:

[github](https://github.com/ipfs/testground/blob/master/pkg/runner/local_docker.go#L49)

| parameter        | explanation                                                  |
| ---------------- | ------------------------------------------------------------ |
| keep\_containers | specify whether containers should be removed after execution |
| log\_level       | specify the logging verbosity                                |
| no\_start        | if set, containers will be created but not executed          |
| background       | if set, the output of containers will not be displayed       |
| ulimits          | override ulimits applied to docker containers                |

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