Update cheatsheets

cmp

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# cmp
+
+> Compare two files byte by byte.
+> More information: <https://www.gnu.org/software/diffutils/manual/html_node/Invoking-cmp.html>.
+
+- Output char and line number of the first difference between two files:
+
+`cmp {{path/to/file1}} {{path/to/file2}}`
+
+- Output info of the first difference: char, line number, bytes, and values:
+
+`cmp --print-bytes {{path/to/file1}} {{path/to/file2}}`
+
+- Output the byte numbers and values of every difference:
+
+`cmp --verbose {{path/to/file1}} {{path/to/file2}}`
+
+- Compare files but output nothing, yield only the exit status:
+
+`cmp --quiet {{path/to/file1}} {{path/to/file2}}`