Update cheatsheets

linux/unix2dos

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# unix2dos
+
+> Change Unix-style line endings to DOS-style.
+> Replaces LF with CRLF.
+> More information: <https://waterlan.home.xs4all.nl/dos2unix.html>.
+
+- Change the line endings of a file:
+
+`unix2dos {{path/to/file}}`
+
+- Create a copy with DOS-style line endings:
+
+`unix2dos -n {{path/to/unix_file}} {{path/to/dos_file}}`