Add missing questions

Author: SamyPesse

SUMMARY.md

@@ -32,6 +32,7 @@
 * [What is an Access Key?](books/what-is-an-access-key.md)
 * [How can I disable/delete an Access Key?](books/how-can-i-disable-access-key.md)
 * [Can I use a custom domain for my book?](books/can-i-use-custom-domain.md)
+* [How can I use Git to update my book?](books/how-can-i-use-git.md)
 
 ### Content & Customization
 
@@ -40,6 +41,7 @@
 * [How can I change the theme?](content/how-can-i-change-theme.md)
 * [How can I integrate dynamic content (such as video)?](content/how-can-i-include-dynamic.md)
 * [How can I enable a plugin?](content/how-can-i-add-plugin.md)
+* [Why are my updates failing to build?](content/why-are-my-updates-failing.md)
 
 ### GitHub Integration
 

books/how-can-i-use-git.md

@@ -0,0 +1,47 @@
+When your book is created on **gitbook.com**, you need to push some content to it. To do so, you can use the online editor or the command line.
+
+If you want to update your book from the command line, you can use [GIT](http://git-scm.com) to push your content:
+
+### GIT Url
+
+Each book is associated with a Git HTTPS url. The ssh protocol is not yet supported on the GitBook's git server.
+
+The format for the git url is:
+
+```
+https://git.gitbook.com/{{UserName}}/{{Book}}.git
+```
+
+### Authentication
+
+The git server is using your basic GitBook login to authenticate you. When prompted enter your GitBook username and your password (you can also use your API token).
+
+### Saving your credentials
+
+To avoid having to enter your password on each new push, you can add your GitBook credentials to your `~/.netrc` file. Create or append to an existing `~/.netrc` file something like below:
+
+```
+machine git.gitbook.com
+  login USERNAME-or-EMAIL
+  password API-TOKEN-or-PASSWORD
+```
+
+We recommend using your **API TOKEN** for security reasons, you can find it [in your settings under "API"](https://www.gitbook.com/settings#api)
+
+### Create a new repository on the command line
+
+```
+touch README.md SUMMARY.md
+git init
+git add README.md SUMMARY.md
+git commit -m "first commit"
+git remote add gitbook https://git.gitbook.com/{{UserName}}/{{Book}}.git
+git push -u -f gitbook master
+```
+
+### Push an existing repository
+
+```
+git remote add gitbook https://git.gitbook.com/{{UserName}}/{{Book}}.git
+git push -u -f gitbook master
+```

content/why-are-my-updates-failing.md

@@ -0,0 +1,3 @@
+Content could fail to updates for multiple reasons: invalid configuration, unstable 3rd party plugins, etc.
+
+Feel free to post an issue on [GitHub](https://github.com/GitbookIO/gitbook/issues) or [Contact us](https://www.gitbook.com/contact). Provide us with as much essential information as possible (url of your failed update, etc).

orgs/what-is-an-organization.md

@@ -1,7 +1,7 @@
 ---
 related:
-    - what-is-difference.md
-    - how-can-i-create.md
+    - orgs/what-is-difference.md
+    - orgs/how-can-i-create.md
 
 ---