talk about using it to verify snapshots and releases..

README.md

@@ -2,18 +2,19 @@ snapaid
 =======
 
 This is a utility that will make it easier to find and download the
-correct snapshot.  It will also fetch and verify the GPG signature
-and hash of the snapshot to ensure that you are getting the correct
-file.
+correct snapshot or release.  It will also fetch and verify the GPG
+signature and hash of the snapshot to ensure that you are getting the
+correct file.
 
 ![Screen shot of snapaid.sh find](images/snapaid.find.png?raw=true)
 
 Quick Start
--------------
+-----------
 
-The only file needed for this is the snapaid.sh script.  The other files
-are used for generating the index.
+The only file needed is the snapaid.sh script.  The other files in the
+repo are used for generating the index.
 
+Setting up and finding a snapshot:
 ```
 $wget https://www.funkthat.com/gitea/jmg/snapaid/raw/branch/master/snapaid.sh
 $chmod 755 snapaid.sh
@@ -32,6 +33,23 @@ Each term between `find` and `1` refines the search, and the `1` selects
 the first image.  The list is sorted by date, then by release, where
 the latest is shown first.
 
+Verifying
+---------
+
+If you've already installed and setup snapaid.sh previously, you can skip
+the first two lines.
+
+Setting up and verifying a snapshot or release:
+```
+$wget https://www.funkthat.com/gitea/jmg/snapaid/raw/branch/master/snapaid.sh
+$chmod 755 snapaid.sh
+$./snapaid.sh verify FreeBSD-12.2-RELEASE-amd64-mini-memstick.img.xz
+```
+
+Note that the provided filename MUST match exactly the released name so
+that it can be found in the index.  It could be possible in the future
+to find it via shasum, but that is not implemented yet.
+
 Notes
 -----