Add Override The Global Git Ignore File as a Git TIL

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1472 TILs and counting..._
+_1473 TILs and counting..._
 
 ---
 
@@ -326,6 +326,7 @@ _1472 TILs and counting..._
 - [List Untracked Files](git/list-untracked-files.md)
 - [List Untracked Files For Scripting](git/list-untracked-files-for-scripting.md)
 - [Move The Latest Commit To A New Branch](git/move-the-latest-commit-to-a-new-branch.md)
+- [Override The Global Git Ignore File](git/override-the-global-git-ignore-file.md)
 - [Pick Specific Changes To Stash](git/pick-specific-changes-to-stash.md)
 - [Pulling In Changes During An Interactive Rebase](git/pulling-in-changes-during-an-interactive-rebase.md)
 - [Push To A Branch On Another Remote](git/push-to-a-branch-on-another-remote.md)

git/override-the-global-git-ignore-file.md

@@ -0,0 +1,33 @@
+# Override The Global Git Ignore File
+
+One of the places that `git` looks when deciding whether to pay attention to or
+ignore a file is in your global _ignore_ file. By default, `git` will look for
+this file at `$XDG_CONFIG_HOME/git/ignore` or `$HOME/.config/git/ignore`.
+
+I don't have `$XDG_CONFIG_HOME` set on my machine, so it will fall back to the
+config directory under `$HOME`.
+
+I may have to create the `git` directory and `ignore` file.
+
+```bash
+$ mkdir $HOME/.config/git
+$ touch $HOME/.config/git/ignore
+```
+
+Then I can add file and directories to exclude to that `ignore` file just like
+I would any other `.gitignore` file.
+
+If I'd prefer for the global _ignore_ file to live somewhere else, I can
+specify that location and filename in my `$HOME/.gitconfig` file.
+
+```
+[core]
+	excludesFile = ~/.gitignore
+```
+
+Setting this will override the default, meaning the default file mentioned
+above will be ignored ("now you know how it feels, ignore file!"). In this
+case, I'll need to create the `.gitignore` file in my home directory and add
+any of my ignore rules.
+
+[source](https://git-scm.com/docs/gitignore)