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+Ubuntu 14.04 LTS
+================
+
+This document describes installation from source. If you want to build a
+``deb``, see :ref:`packaging-debian`.
+
+Installing Dependencies
+-----------------------
+
+.. code-block:: console
+
+   apt-get update
+   apt-get install \
+      git autoconf automake libtool make libreadline-dev texinfo \
+      pkg-config libpam0g-dev libjson-c-dev bison flex python3-pytest \
+      libc-ares-dev python3-dev python3-sphinx install-info build-essential \
+      libsnmp-dev perl libcap-dev libelf-dev
+
+.. include:: building-libyang.rst
+
+Building & Installing FRR
+-------------------------
+
+Add FRR user and groups
+^^^^^^^^^^^^^^^^^^^^^^^
+
+.. code-block:: console
+
+    sudo groupadd -r -g 92 frr
+    sudo groupadd -r -g 85 frrvty
+    sudo adduser --system --ingroup frr --home /var/run/frr/ \
+       --gecos "FRR suite" --shell /sbin/nologin frr
+    sudo usermod -a -G frrvty frr
+
+Compile
+^^^^^^^
+
+.. include:: include-compile.rst
+
+Install FRR configuration files
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. code-block:: console
+
+   sudo install -m 775 -o frr -g frr -d /var/log/frr
+   sudo install -m 775 -o frr -g frrvty -d /etc/frr
+   sudo install -m 640 -o frr -g frrvty tools/etc/frr/vtysh.conf /etc/frr/vtysh.conf
+   sudo install -m 640 -o frr -g frr tools/etc/frr/frr.conf /etc/frr/frr.conf
+   sudo install -m 640 -o frr -g frr tools/etc/frr/daemons.conf /etc/frr/daemons.conf
+   sudo install -m 640 -o frr -g frr tools/etc/frr/daemons /etc/frr/daemons
+
+Tweak sysctls
+^^^^^^^^^^^^^
+
+Some sysctls need to be changed in order to enable IPv4/IPv6 forwarding and
+MPLS (if supported by your platform). If your platform does not support MPLS,
+skip the MPLS related configuration in this section.
+
+Edit :file:`/etc/sysctl.conf` and uncomment the following values (ignore the
+other settings):
+
+::
+
+   # Uncomment the next line to enable packet forwarding for IPv4
+   net.ipv4.ip_forward=1
+
+   # Uncomment the next line to enable packet forwarding for IPv6
+   #  Enabling this option disables Stateless Address Autoconfiguration
+   #  based on Router Advertisements for this host
+   net.ipv6.conf.all.forwarding=1
+
+Reboot or use ``sysctl -p`` to apply the same config to the running system.
+
+Add MPLS kernel modules
+"""""""""""""""""""""""
+
+.. warning::
+
+   MPLS is not supported on Ubuntu 14.04 with the default kernel. MPLS requires
+   kernel 4.5 or higher. LDPD can be built, but may have limited use without
+   MPLS. For an updated Ubuntu Kernel, see
+   http://kernel.ubuntu.com/~kernel-ppa/mainline/
+
+Ubuntu 18.04 ships with kernel 4.15. MPLS modules are present by default.  To
+enable, add the following lines to :file:`/etc/modules-load.d/modules.conf`:
+
+::
+
+   # Load MPLS Kernel Modules
+   mpls_router
+   mpls_iptunnel
+
+
+And load the kernel modules on the running system:
+
+.. code-block:: console
+
+   sudo modprobe mpls-router mpls-iptunnel
+
+Enable MPLS Forwarding
+""""""""""""""""""""""
+
+Edit :file:`/etc/sysctl.conf` and the following lines. Make sure to add a line
+equal to :file:`net.mpls.conf.eth0.input` for each interface used with MPLS.
+
+::
+
+   # Enable MPLS Label processing on all interfaces
+   net.mpls.conf.eth0.input=1
+   net.mpls.conf.eth1.input=1
+   net.mpls.conf.eth2.input=1
+   net.mpls.platform_labels=100000
+
+Install the init.d service
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. code-block:: console
+
+   sudo install -m 755 tools/frr /etc/init.d/frr
+
+Enable daemons
+^^^^^^^^^^^^^^
+
+Open :file:`/etc/frr/daemons` with your text editor of choice. Look for the
+section with ``watchfrr_enable=...`` and ``zebra=...`` etc.  Enable the daemons
+as required by changing the value to ``yes``.
+
+Start the init.d service
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. code-block:: console
+
+  /etc/init.d/frr start
+
+Use ``/etc/init.d/frr status`` to check its status.