Update cheatsheets

linux/alpine

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# alpine
+
+> An email client and Usenet newsgroup program with a pico/nano-inspired interface.
+> Supports most modern email services through IMAP.
+> More information: <https://manned.org/alpine>.
+
+- Open alpine normally:
+
+`alpine`
+
+- Open alpine directly to the message composition screen to send an email to a given email address:
+
+`alpine {{email@example.net}}`
+
+- Quit alpine:
+
+`q + y`