Update cheatsheets

tldr/linux/unrtf

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# unrtf
+
+> Convert RTF files to other file formats.
+> More information: <https://manned.org/unrtf>.
+
+- Convert an RTF file to HTML (default):
+
+`unrtf {{path/to/file.rtf}}`
+
+- Convert an RTF file to plain ASCII:
+
+`unrtf --text {{path/to/file.rtf}}`
+
+- Convert an RTF file to LaTeX:
+
+`unrtf --latex {{path/to/file.rtf}}`