# Create system user with custom home directory

To create a system user to run an app, you can use the `useradd` command.

Here is an example to create one with a custom home directory:

```sh
sudo useradd -d /opt/app -m -r -G docker,www-data docker-website
```

That `docker-website` user will have its home directory at `/opt/app` that will be created if it doesn't exists (if it does, you'll have to change its owner), will be a system user and will be in two groups, `docker` and `www-data`.