Add docs on admin access

docs/admin.md

@@ -0,0 +1,52 @@
+# Administrative Access
+
+In The Littlest JupyterHub, we try to allow users to do as many administrative
+tasks as possible within JupyterHub itself. Admin users can:
+
+1. Have full root access with passwordless `sudo`
+2. Install systemwide packages with `apt`
+3. Install `conda` / `pip` packages for all JupyterHub
+4. Change amount of RAM / CPU available to each user
+and more!
+
+By default, there are no admin users. You should add some after installation.
+
+## Adding admin users
+
+Admin users are specified in the [YAML](https://en.wikipedia.org/wiki/YAML)
+config file at `/opt/tljh/config.yaml`.
+
+1. Open the `config.yaml` file for editing.
+
+   ```bash
+   sudo nano /opt/tljh/config.yaml
+   ```
+
+2. Add usernames that should have admin access.
+
+   ```yaml
+   users:
+     admin:
+       - user1
+       - user2
+   ```
+
+   Be careful around the syntax - indentation matters, and you should be using
+   spaces and not tabs.
+
+   When you are done, save the file and exit. In `nano`, you can do this with
+   `Ctrl+X` key.
+
+3. When you are sure the format is ok, restart JupyterHub to let the config take
+   effect.
+
+   ```bash
+   sudo systemctl restart jupyterhub
+   ```
+
+This should give you admin access from JupyterHub! You can verify this by:
+
+1. Opening a Terminal in your JupyterHub and checking if `sudo` works
+2. Opening your JupyterHub `Control Panel` and checking for the **Admin** tab
+
+From now on, you can use the JupyterHub to do most configuration changes.

docs/index.md

@@ -21,3 +21,4 @@ makes you nervous, check out the [other installation methods](install.md) we sup
 
 - [Server requirements](requirements.md)
 - [Installation](install.md)
+- [Administrative Access](admin.md)

docs/install.md

@@ -10,6 +10,9 @@ curl https://raw.githubusercontent.com/yuvipanda/the-littlest-jupyterhub/master/
 This takes 2-5 minutes to run. When completed, you can access your new JupyterHub
 at the public IP of your server!
 
+You should probably add yourself as an [admin user](admin.md)
+after installation.
+
 ## Slightly less quick installation
 
 If you can read `bash` and are nervous about the previous installation method,