Migrate new file structure to crux (#435)

* order workflows and add submodule

* rename gitmodules file

* delete docs/.gitignore

* add vyos custom linter

* correct __pycache__ in gitignore

* add test-coverage.py

* move draw.io folder

* arrange changelog, install history and about

* arrange: firewall

* arrange: highavailability

* arrange: loadbalancing

* arrange: nat

* arrange: services

* sort configexamples and configuration interfaces

* wireles: rename wireless

* rearrange: Protocols and Policy

* rearrange: Firewall and Zone Policy

* rearrange: Interfaces

* rearrange: Interfaces

* rearrange: dynamic DNS

* hostinfo: add page to index

* rearrange: appendix

* venv: add Pipfile

* rearrange: contributing

* index: remove debugging

* rearrange: fix all figure and refs

* rearrange: commandtree

* fix: cli, openvpn, install headline level

* protocols: change headline

* firewall: move mss clamping

* ip: separate ipv4 and ipv6

* arp: move to static page

* igmp: rename multicast page

* Update to year 2021

1 files changed, 56 insertions, 0 deletions

diff --git a/docs/operation/boot-options.rst b/docs/operation/boot-options.rst
new file mode 100644
index 00000000..1070afa9
--- /dev/null
+++ b/docs/operation/boot-options.rst
@@ -0,0 +1,56 @@
+.. _boot-options:
+
+
+############
+Boot Options
+############
+
+.. warning:: This function may be highly disruptive.
+   It may cause major service interruption, so make sure you really
+   need it and verify your input carefully.
+
+
+
+VyOS has several kernel command line options to modify the normal boot
+process. 
+To add an option, select the desired image in GRUB menu at load
+time, press **e**, edit the first line, and press **Ctrl-x** to boot when
+ready.
+
+.. image:: /_static/images/boot-options.png
+   :width: 80%
+   :align: center
+
+
+Specify custom config file
+==========================
+
+Tells the system to use specified file instead of ``/config/config.boot``.
+If specified file does not exist or is not readable, fall back to
+default config. No additional verification is performed, so make sure
+you specify a valid config file.
+
+.. code-block:: none
+
+   vyos-config=/path/to/file
+
+To load the *factory default* config, use:
+
+.. code-block:: none
+
+   vyos-config=/opt/vyatta/etc/config.boot.default
+
+
+Disable specific boot process steps
+===================================
+
+These options disable some boot steps. Make sure you understand the
+:ref:`boot process <boot-steps>` well before using them!
+
+.. glossary::
+
+    no-vyos-migrate
+      Do not perform config migration.
+
+    no-vyos-firewall
+      Do not initialize default firewall chains, renders any firewall configuration unusable.