Update cheatsheets

linux/rfkill

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# rfkill
+
+> Enable and disable wireless devices.
+> More information: <https://manned.org/rfkill>.
+
+- List devices:
+
+`rfkill`
+
+- Filter by columns:
+
+`rfkill -o {{ID,TYPE,DEVICE}}`
+
+- Block devices by type (e.g. bluetooth, wlan):
+
+`rfkill block {{bluetooth}}`
+
+- Unblock devices by type (e.g. bluetooth, wlan):
+
+`rfkill unblock {{wlan}}`
+
+- Output in JSON format:
+
+`rfkill -J`