From 8e3f0056b4d1f40f358f9b2ca1f51d57f78315bb Mon Sep 17 00:00:00 2001
From: Michele Cereda <cereda.michele@gmail.com>
Date: Wed, 27 Apr 2022 18:23:36 +0200
Subject: [PATCH] Added vim notes to the knowledge base

---
 knowledge base/vim.md | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 knowledge base/vim.md

diff --git a/knowledge base/vim.md b/knowledge base/vim.md
new file mode 100644
index 0000000..74a8e60
--- /dev/null
+++ b/knowledge base/vim.md	
@@ -0,0 +1,41 @@
+# Vim
+
+## Tl;DR
+
+```shell
+# Get help on something.
+:help modeline
+```
+
+## Modelines
+
+Set different options for a particular file.
+
+> The `modeline` option must be enabled in order to take advantage of this.  
+> This option is **set** by default for Vim running in nocompatible mode, but some notable distributions of Vim disable it in the system's `vimrc` for security. In addition, the option is **off** by default when editing as `root`.
+
+See `:help modeline` for more information.
+
+The modeline line needs to:
+
+- be placed near the top of the file; how near, will depend on the modeline settings
+- start with a comment opening for the file type.
+
+> The space between the comment opening and 'vim' is necessary for the modeline to be recognized.
+
+Examples:
+
+```text
+# vim: set expandtab:
+
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+/* ex: set ts=8 sw=4 tw=0 noet : */
+```
+
+## Further readings
+
+- [Modeline magic]
+
+[modeline magic]: https://vim.fandom.com/wiki/Modeline_magic