diff --git a/README.md b/README.md
index 763931e..65e00fb 100644
--- a/README.md
+++ b/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).
 
-_1651 TILs and counting..._
+_1652 TILs and counting..._
 
 See some of the other learning resources I work on:
 - [Get Started with Vimium](https://egghead.io/courses/get-started-with-vimium~3t5f7)
@@ -1534,6 +1534,7 @@ If you've learned something here, support my efforts writing daily TILs by
 ### Unix
 
 - [All The Environment Variables](unix/all-the-environment-variables.md)
+- [Authorize A cURL Request](unix/authorize-a-curl-request.md)
 - [Cat A File With Line Numbers](unix/cat-a-file-with-line-numbers.md)
 - [Cat Files With Color Using Bat](unix/cat-files-with-color-using-bat.md)
 - [Change Default Shell For A User](unix/change-default-shell-for-a-user.md)
diff --git a/unix/authorize-a-curl-request.md b/unix/authorize-a-curl-request.md
new file mode 100644
index 0000000..7cad6cd
--- /dev/null
+++ b/unix/authorize-a-curl-request.md
@@ -0,0 +1,32 @@
+# Authorize A cURL Request
+
+When making a cURL request to an endpoint that requires authentication,
+sometimes you already have a bearer token and other times you have a username
+and password pair. If you have a bearer token, you can format a `Authorization`
+header with the `-H` flag that includes that value.
+
+If you have a username and password for the API, you can instead use the `-u`
+flag. The `-u` flag will format the username and password, base64 encode it,
+and then add it as an `Authorization` header.
+
+```bash
+$ curl -v -u "username:password" https://some-endpoint.com/api/v1/status
+
+...
+> GET /api/v1/status HTTP/2
+> Host: some-endpoint.com
+> Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQK
+> User-Agent: curl/8.1.2
+...
+```
+
+You can even pass in only the username to the `-u` flag and cURL will know to
+prompt you for the password. This is a nice way to avoid putting plain text
+passwords in your shell history.
+
+```bash
+$ curl -v -u "username" https://some-endpoint.com/api/v1/status
+Enter host password for user 'username':
+```
+
+See `man curl` for more details.