Update cheatsheets

zcmp

@@ -0,0 +1,17 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# zcmp
+
+> Compare compressed files.
+> More information: <https://manned.org/zcmp>.
+
+- Invoke `cmp` on two files compressed via `gzip`:
+
+`zcmp {{path/to/file1.gz}} {{path/to/file2.gz}}`
+
+- Compare a file to its gzipped version (assuming `.gz` exists already):
+
+`zcmp {{path/to/file}}`