# Mix v1.10.3 mix local.public_keys View Source

Public keys are used by Mix to install packages like Rebar and Hex.

Mix by default ships with a public key but new ones can be added on demand.

To list all available keys:

    $ mix local.public_keys

To list all available keys showing the keys themselves:

    $ mix local.public_keys --detailed

To add a new key:

    $ mix local.public_keys local/path/to/key

Be careful when adding new keys. Only add keys from sources you trust.

Public keys are by default stored in your MIX_HOME under the public_keys directory.

## Command line options

- `--force` - forces installation without a shell prompt; primarily intended for automation in build systems like `make`