diff --git a/hashdiff b/hashdiff
new file mode 100755
index 0000000..f9bb29e
--- /dev/null
+++ b/hashdiff
@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+# Compare two files by hash.
+# Based on http://alanwsmith.com/command-line-one-liner-to-compare-files-with-md5
+
+# Future enhancements:
+# * different hashes
+# * "paranoid" mode (use several different hashes)
+# * compare more than two files
+# * verbose: print out hashes if different
+
+file1=$1
+file2=$2
+
+if [ $(md5 -q ${file1}) == $(md5 -q ${file2}) ]
+then
+    echo "identical"
+else
+    echo "different"
+fi