Update cheatsheets

tldr/coreutils

@@ -0,0 +1,22 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# coreutils
+
+> Uutils coreutils is a cross-platform reimplementation of the GNU coreutils in Rust Language.
+> Uutils includes a multi-call binary from which the utils can be invoked. This reduces the binary size of the binary and can be useful for portability.
+> More information: <https://uutils.github.io/coreutils/docs/multicall.html>.
+
+- Run a utility with arguments:
+
+`coreutils {{util}} {{util_options}}`
+
+- List files in [l]ong format:
+
+`coreutils ls -l`
+
+- Display help for `ls`:
+
+`coreutils ls --help`