Update cheatsheets

rfetch

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# rfetch
+
+> A configurable fetch program to output system information.
+> More information: <https://github.com/kamui-fin/rfetch>.
+
+- Display system information:
+
+`rfetch`
+
+- Display system [a]rchitecture:
+
+`rfetch -a`
+
+- Display system up[t]ime:
+
+`rfetch -t`
+
+- Display system [k]ernel:
+
+`rfetch -k`
+
+- Display system [c]PU:
+
+`rfetch -c`
+
+- Display Linux [D]istro:
+
+`rfetch -D`
+
+- View [d]esktop environment:
+
+`rfetch -d`