SSoT audit fixes

Implements part of the single source of truth audit
fixes for the topics/git section.

doc/topics/git/how_to_install_git/index.md

@@ -5,14 +5,20 @@ level: beginner
 article_type: user guide
 date: 2017-05-15
 description: 'This article describes how to install Git on macOS, Ubuntu Linux and Windows.'
+type: howto
+last_updated: 2019-05-31
 ---
 
 # Installing Git
 
-To begin contributing to GitLab projects
+To begin contributing to GitLab projects,
 you will need to install the Git client on your computer.
+
 This article will show you how to install Git on macOS, Ubuntu Linux and Windows.
 
+Information on [installing Git](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git)
+is also available at the official Git website.
+
 ## Install Git on macOS using the Homebrew package manager
 
 Although it is easy to use the version of Git shipped with macOS
@@ -21,7 +27,7 @@ we recommend installing it via Homebrew to get access to
 an extensive selection of dependency managed libraries and applications.
 
 If you are sure you don't need access to any additional development libraries
-or don't have approximately 15gb of available disk space for Xcode and Homebrew
+or don't have approximately 15gb of available disk space for Xcode and Homebrew,
 use one of the aforementioned methods.
 
 ### Installing Xcode
@@ -40,11 +46,12 @@ for the official Homebrew installation instructions.
 With Homebrew installed you are now ready to install Git.
 Open a Terminal and enter in the following command:
 
-```bash
+```sh
 brew install git
 ```
 
 Congratulations you should now have Git installed via Homebrew.
+
 Next read our article on [adding an SSH key to GitLab](../../../ssh/README.md).
 
 ## Install Git on Ubuntu Linux
@@ -55,16 +62,30 @@ it is recommended to use the built in package manager to install Git.
 Open a Terminal and enter in the following commands
 to install the latest Git from the official Git maintained package archives:
 
-```bash
+```sh
 sudo apt-add-repository ppa:git-core/ppa
 sudo apt-get update
 sudo apt-get install git
 ```
 
 Congratulations you should now have Git installed via the Ubuntu package manager.
+
 Next read our article on [adding an SSH key to GitLab](../../../ssh/README.md).
 
 ## Installing Git on Windows from the Git website
 
 Browse to the [Git website](https://git-scm.com/) and download and install Git for Windows.
+
 Next read our article on [adding an SSH key to GitLab](../../../ssh/README.md).
+
+<!-- ## Troubleshooting
+
+Include any troubleshooting steps that you can foresee. If you know beforehand what issues
+one might have when setting this up, or when something is changed, or on upgrading, it's
+important to describe those, too. Think of things that may go wrong and include them here.
+This is important to minimize requests for support, and to avoid doc comments with
+questions that you know someone might ask.
+
+Each scenario can be a third-level heading, e.g. `### Getting error message X`.
+If you have none to add when creating a doc, leave this section in place
+but commented out to help encourage others to add to it in the future. -->

doc/topics/git/index.md

-# Git documentation
+---
+type: index
+---
+
+# Git
 
 Git is a [free and open source](https://git-scm.com/about/free-and-open-source)
 distributed version control system designed to handle everything from small to
-very large projects with speed and efficiency.
+large projects with speed and efficiency.
 
 [GitLab](https://about.gitlab.com) is a Git-based fully integrated platform for
 software development. Besides Git's functionalities, GitLab has a lot of
@@ -11,64 +15,71 @@ powerful [features](https://about.gitlab.com/features/) to enhance your
 
 We've gathered some resources to help you to get the best from Git with GitLab.
 
+More information is also available on the [Git website](https://git-scm.com).
+
 ## Getting started
 
-- [Git concepts](../../university/training/user_training.md#git-concepts)
+The following resources will help you get started with Git:
+
+- [Git Basics](https://git-scm.com/book/en/v2/Getting-Started-Git-Basics)
+- [Git on the Server - GitLab](https://git-scm.com/book/en/v2/Git-on-the-Server-GitLab)
 - [How to install Git](how_to_install_git/index.md)
 - [Start using Git on the command line](../../gitlab-basics/start-using-git.md)
 - [Command Line basic commands](../../gitlab-basics/command-line-commands.md)
 - [GitLab Git Cheat Sheet (download)](https://about.gitlab.com/images/press/git-cheat-sheet.pdf)
-- Commits
-  - [Revert a commit](../../user/project/merge_requests/revert_changes.md#reverting-a-commit) 
+- Commits:
+  - [Revert a commit](../../user/project/merge_requests/revert_changes.md#reverting-a-commit)
   - [Cherry-picking a commit](../../user/project/merge_requests/cherry_pick_changes.md#cherry-picking-a-commit)
   - [Squashing commits](../../workflow/gitlab_flow.md#squashing-commits-with-rebase)
 
-**Third-party references:**
+### Concepts
 
-- [Getting Started - Git website](https://git-scm.com)
-- [Getting Started - Version control](https://git-scm.com/book/en/v2/Getting-Started-About-Version-Control)
-- [Getting Started - Git Basics](https://git-scm.com/book/en/v2/Getting-Started-Git-Basics)
-- [Getting Started - Installing Git](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git)
-- [Git on the Server - GitLab](https://git-scm.com/book/en/v2/Git-on-the-Server-GitLab)
+The following are resources about version control concepts:
 
-### Concepts
+- [Git concepts](../../university/training/user_training.md#git-concepts)
+- [Why Git is Worth the Learning Curve](https://about.gitlab.com/2017/05/17/learning-curve-is-the-biggest-challenge-developers-face-with-git/)
+- [The future of SaaS hosted Git repository pricing](https://about.gitlab.com/2016/05/11/git-repository-pricing/)
+- [Git website topic about version control](https://git-scm.com/book/en/v2/Getting-Started-About-Version-Control)
+- [GitLab University presentation about Version Control](https://docs.google.com/presentation/d/16sX7hUrCZyOFbpvnrAFrg6tVO5_yT98IgdAqOmXwBho/edit?usp=sharing)
 
-- Article (2017-05-17): [Why Git is Worth the Learning Curve](https://about.gitlab.com/2017/05/17/learning-curve-is-the-biggest-challenge-developers-face-with-git/)
-- Article (2016-05-11): [The future of SaaS hosted Git repository pricing](https://about.gitlab.com/2016/05/11/git-repository-pricing/)
-- GLU Course (Presentation): [About Version Control](https://docs.google.com/presentation/d/16sX7hUrCZyOFbpvnrAFrg6tVO5_yT98IgdAqOmXwBho/edit?usp=sharing)
+## Git tips
 
-## Exploring Git
+The following resources may help you become more efficient at using Git:
 
 - [Git Tips & Tricks](https://about.gitlab.com/2016/12/08/git-tips-and-tricks/)
 - [Eight Tips to help you work better with Git](https://about.gitlab.com/2015/02/19/8-tips-to-help-you-work-better-with-git/)
 
 ## Troubleshooting Git
 
+If you have problems with Git, the following may help:
+
 - [Numerous _undo_ possibilities in Git](numerous_undo_possibilities_in_git/index.md)
-- Learn a few [Git troubleshooting](troubleshooting_git.md) techniques to help you out.
+- Learn a few [Git troubleshooting](troubleshooting_git.md) techniques
 
 ## Branching strategies
 
-- [GitLab Flow](https://about.gitlab.com/2014/09/29/gitlab-flow/)
-
-**Third-party references:**
-
 - [Git Branching - Branches in a Nutshell](https://git-scm.com/book/en/v2/Git-Branching-Branches-in-a-Nutshell)
 - [Git Branching - Branching Workflows](https://git-scm.com/book/en/v2/Git-Branching-Branching-Workflows)
+- [GitLab Flow](https://about.gitlab.com/2014/09/29/gitlab-flow/)
 
 ## Advanced use
 
+The following are advanced topics for those who want to get the most out of Git:
+
 - [Custom Git Hooks](../../administration/custom_hooks.md)
 - [Git Attributes](../../user/project/git_attributes.md)
 - Git Submodules: [Using Git submodules with GitLab CI](../../ci/git_submodules.md#using-git-submodules-with-gitlab-ci)
 
 ## API
 
-- [Gitignore templates](../../api/templates/gitignores.md)
+[Gitignore templates](../../api/templates/gitignores.md) API allow for
+Git-related queries from GitLab.
 
 ## Git LFS
 
+The following relate to Git Large File Storage:
+
 - [Getting Started with Git LFS](https://about.gitlab.com/2017/01/30/getting-started-with-git-lfs-tutorial/)
 - [GitLab Git LFS documentation](../../workflow/lfs/manage_large_binaries_with_git_lfs.md)
 - [Git-Annex to Git-LFS migration guide](../../workflow/lfs/migrate_from_git_annex_to_git_lfs.md)
-- Article (2015-08-13): [Towards a production quality open source Git LFS server](https://about.gitlab.com/2015/08/13/towards-a-production-quality-open-source-git-lfs-server/)
+- [Towards a production quality open source Git LFS server](https://about.gitlab.com/2015/08/13/towards-a-production-quality-open-source-git-lfs-server/)

doc/topics/git/troubleshooting_git.md

+---
+type: howto
+---
+
 # Troubleshooting Git
 
 Sometimes things don't work the way they should or as you might expect when
@@ -9,7 +13,7 @@ with Git.
 'Broken pipe' errors can occur when attempting to push to a remote repository.
 When pushing you will usually see:
 
-```
+```text
 Write failed: Broken pipe
 fatal: The remote end hung up unexpectedly
 ```
@@ -39,14 +43,15 @@ There's another option where you can prevent session timeouts by configuring
 SSH 'keep alive' either on the client or on the server (if you are a GitLab
 admin and have access to the server).
 
-NOTE: **Note:** configuring *both* the client and the server is unnecessary.
+NOTE: **Note:**
+Configuring *both* the client and the server is unnecessary.
 
 **To configure SSH on the client side**:
 
--  On UNIX, edit `~/.ssh/config` (create the file if it doesn’t exist) and
-   add or edit:
+- On UNIX, edit `~/.ssh/config` (create the file if it doesn’t exist) and
+  add or edit:
 
-    ```
+    ```text
     Host your-gitlab-instance-url.com
       ServerAliveInterval 60
       ServerAliveCountMax 5
@@ -58,7 +63,7 @@ NOTE: **Note:** configuring *both* the client and the server is unnecessary.
 
 **To configure SSH on the server side**, edit `/etc/ssh/sshd_config` and add:
 
-```
+```text
 ClientAliveInterval 60
 ClientAliveCountMax 5
 ```
@@ -83,35 +88,35 @@ to >= 2.9 (see [Broken pipe when pushing to Git repository][Broken-Pipe]).
 Users may experience the following error when attempting to push or pull
 using Git over SSH:
 
-```
-Please make sure you have the correct access rights 
-and the repository exists. 
+```text
+Please make sure you have the correct access rights
+and the repository exists.
 ...
-ssh_exchange_identification: read: Connection reset by peer 
-fatal: Could not read from remote repository. 
+ssh_exchange_identification: read: Connection reset by peer
+fatal: Could not read from remote repository.
 ```
 
 This error usually indicates that SSH daemon's `MaxStartups` value is throttling
-SSH connections. This setting specifies the maximum number of unauthenticated 
+SSH connections. This setting specifies the maximum number of unauthenticated
 connections to the SSH daemon. This affects users with proper authentication
 credentials (SSH keys) because every connection is 'unauthenticated' in the
-beginning. The default value is `10`. 
+beginning. The default value is `10`.
 
 Increase `MaxStartups` by adding or modifying the value in `/etc/ssh/sshd_config`:
 
-```
+```text
 MaxStartups 100
 ```
 
-Restart SSHD for the change to take effect. 
+Restart SSHD for the change to take effect.
 
 ## Timeout during git push/pull
 
 If pulling/pushing from/to your repository ends up taking more than 50 seconds,
-a timeout will be issued with a log of the number of operations performed 
+a timeout will be issued with a log of the number of operations performed
 and their respective timings, like the example below:
 
-```
+```text
 remote: Running checks for branch: master
 remote: Scanning for LFS objects... (153ms)
 remote: Calculating new repository size... (cancelled after 729ms)