diff --git a/cool_oneliners/file_cat.nu b/cool_oneliners/file_cat.nu
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--- /dev/null
+++ b/cool_oneliners/file_cat.nu
@@ -0,0 +1,3 @@
+# Combine two files into one
+# You can generate `a.json` with something like `range 1..5 | save a.json`
+echo (open a.json) (open b.json) | save c.json