os/docs/_includes/os-sidebar.html

<ul id="menu">
    <li><a href="{{site.baseurl}}/os/">Overview</a></li>
    <li><a href="{{site.baseurl}}/os/quick-start-guide/">Quick Start Guide</a></li>
    <li>
        <a href="#">
            Running RancherOS <i class="pull-right fa fa-angle-down"></i></a>
        <ul>
            <li>
                <a href="#">Workstation <i class="pull-right fa fa-angle-down"></i></a>
                <ul>
                    <li><a href="{{site.baseurl}}/os/running-rancheros/workstation/docker-machine/">Docker Machine</a></li>
                    <li><a href="{{site.baseurl}}/os/running-rancheros/workstation/boot-from-iso/">Boot from ISO</a></li>
                </ul>
            </li>
            <li>
                <a href="#">Cloud <i class="pull-right fa fa-angle-down"></i></a>
                <ul>
                    <li><a href="{{site.baseurl}}/os/running-rancheros/cloud/aws/">AWS</a></li>
                    <li><a href="{{site.baseurl}}/os/running-rancheros/cloud/gce/">GCE</a></li>
                    <li><a href="{{site.baseurl}}/os/running-rancheros/cloud/do/">DigitalOcean</a></li>
                    <li><a href="{{site.baseurl}}/os/running-rancheros/cloud/openstack/">Openstack</a></li>
                    <li><a href="{{site.baseurl}}/os/running-rancheros/server/pxe/">PXE</a></li>
                </ul>
            </li>
            <li>
                <a href="#">Bare metal and Virtual Server <i class="pull-right fa fa-angle-down"></i></a>
                <ul>
                    <li><a href="{{site.baseurl}}/os/running-rancheros/server/install-to-disk/">Install to Disk</a></li>
                    <li><a href="{{site.baseurl}}/os/running-rancheros/server/pxe/">PXE</a></li>
                    <li><a href="{{site.baseurl}}/os/running-rancheros/server/raspberry-pi/">Raspberry Pi</a></li>
                </ul>
            </li>
        </ul>
    </li>
    <li>
        <a href="#">Configuration <i class="pull-right fa fa-angle-down"></i></a>
        <ul>
            <li><a href="{{site.baseurl}}/os/configuration/">Configuring RancherOS</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/ssh-keys/">SSH Keys</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/write-files/">Writing Files</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/running-commands/">Running Commands</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/hostname/">Setting the Hostname</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/switching-consoles/">Switching Consoles</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/docker/">Configuring Docker or System Docker</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/setting-up-docker-tls/">Setting up Docker TLS</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/private-registries/">Private Registries</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/switching-docker-versions/">Switching Docker Versions</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/users/">Users</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/resizing-device-partition/">Resizing a Device Partition</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/sysctl/">sysctl Settings</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/adding-kernel-parameters/">Adding kernel parameters</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/loading-kernel-modules/">Loading kernel modules</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/kernel-modules-kernel-headers/">Install kernel modules that require kernel headers</a></li>
        </ul>
    </li>
    <li>
        <a href="#">System Services<i class="pull-right fa fa-angle-down"></i></a>
        <ul>
            <li><a href="{{site.baseurl}}/os/system-services/adding-system-services/">System Services</a></li>
	    <li><a href="{{site.baseurl}}/os/system-services/custom-system-services/">Custom Services</a></li>
            <li><a href="{{site.baseurl}}/os/system-services/system-docker-volumes/">System Docker Volumes</a></li>
            <li><a href="{{site.baseurl}}/os/system-services/environment/">Environment</a></li>
        </ul>
    </li>
    <li>
        <a href="#">Boot Process<i class="pull-right fa fa-angle-down"></i></a>
        <ul>
		<li><a href="{{site.baseurl}}/os/boot-process/built-in-system-services/">Built-in System Services</a></li>
		<li><a href="{{site.baseurl}}/os/boot-process/cloud-init/">Cloud-init</a></li>
		<li><a href="{{site.baseurl}}/os/boot-process/image-preloading/">Image Preloading</a></li>
        </ul>
    </li>
    <li>
        <a href="#">Storage<i class="pull-right fa fa-angle-down"></i></a>
        <ul>
            <li><a href="{{site.baseurl}}/os/storage/state-partition/">State Partition</a></li>
            <li><a href="{{site.baseurl}}/os/storage/additional-mounts/">Additional Mounts</a></li>
            <li><a href="{{site.baseurl}}/os/storage/using-zfs/">Using ZFS</a></li>
        </ul>
    </li>
    <li>
        <a href="#">Networking<i class="pull-right fa fa-angle-down"></i></a>
        <ul>
            <li><a href="{{site.baseurl}}/os/networking/interfaces/">Interfaces</a></li>
            <li><a href="{{site.baseurl}}/os/networking/dns/">DNS</a></li>
            <li><a href="{{site.baseurl}}/os/networking/proxy-settings/">Proxy Settings</a></li>
        </ul>
    </li>
    <li>
        <a href="#">Custom Builds<i class="pull-right fa fa-angle-down"></i></a>
        <ul>
            <li><a href="{{site.baseurl}}/os/configuration/custom-kernels/">Custom Kernels</a></li>
            <li><a href="{{site.baseurl}}/os/configuration/custom-rancheros-iso/">Building custom RancherOS ISO</a></li>
        </ul>
    </li>
    <li><a href="{{site.baseurl}}/os/upgrading/">Upgrading</a></li>
    <li><a href="{{site.baseurl}}/os/amazon-ecs/">Amazon ECS</a></li>
    <li><a href="{{site.baseurl}}/os/contributing/">Contributing to RancherOS</a></li>
    <li><a href="{{site.baseurl}}/os/running-rancher-on-rancheros/">Tips on using Rancher with RancherOS</a></li>
    <li><a href="{{site.baseurl}}/os/security/">RancherOS security</a></li>
</ul>