Add Find All Files With A Specific Extension With fd as a Unix 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).
 
-_1314 TILs and counting..._
+_1315 TILs and counting..._
 
 ---
 
@@ -1261,6 +1261,7 @@ _1314 TILs and counting..._
 - [Figure Out The Week Of The Year From The Terminal](unix/figure-out-the-week-of-the-year-from-the-terminal.md)
 - [File Type Info With File](unix/file-type-info-with-file.md)
 - [Find All Files Matching A Name With fd](unix/find-all-files-matching-a-name-with-fd.md)
+- [Find All Files With A Specific Extension With fd](unix/find-all-files-with-a-specific-extension-with-fd.md)
 - [Find A File Installed By Brew](unix/find-a-file-installed-by-brew.md)
 - [Find Duplicate Lines In A File](unix/find-duplicate-lines-in-a-file.md)
 - [Find Files With fd](unix/find-files-with-fd.md)

unix/find-all-files-with-a-specific-extension-with-fd.md

@@ -0,0 +1,24 @@
+# Find All Files With A Specific Extension With fd
+
+The best way with [`fd`](https://github.com/sharkdp/fd) to match on files with
+a specific extension is to use the `-e` flag.
+
+Here is how you'd find all `.ts` files:
+
+```bash
+$ fd -e ts
+```
+
+You can use the flag multiple times to specify multiple file extensions. This
+will turn up all TypeScript and JavaScript files:
+
+```bash
+$ fd -e ts -e js
+```
+
+Alternatively, you can use regex in the filename pattern to match on several
+file extensions like so:
+
+```bash
+$ fd '.*\.(js|ts|jsx|tsx)$'
+```