Update cheatsheets

linux/beep

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# beep
+
+> A utility to beep the PC speaker.
+> More information: <https://github.com/spkr-beep/beep>.
+
+- Play a beep:
+
+`beep`
+
+- Play a beep that repeats:
+
+`beep -r {{repetitions}}`
+
+- Play a beep at a specified frequency (Hz) and duration (milliseconds):
+
+`beep -f {{frequency}} -l {{duration}}`
+
+- Play each new frequency and duration as a distinct beep:
+
+`beep -f {{frequency}} -l {{duration}} -n -f {{frequency}} -l {{duration}}`
+
+- Play the C major scale:
+
+`beep -f {{262}} -n -f {{294}} -n -f {{330}} -n -f {{349}} -n -f {{392}} -n -f {{440}} -n -f {{494}} -n -f {{523}}`