Update cheatsheets

linux/betterlockscreen

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# betterlockscreen
+
+> Simple, minimal lock screen.
+> More information: <https://github.com/pavanjadhaw/betterlockscreen>.
+
+- Lock the screen:
+
+`betterlockscreen --lock`
+
+- Change the lock screen background:
+
+`betterlockscreen -u {{path/to/image.png}}`
+
+- Lock the screen, showing some custom text:
+
+`betterlockscreen -l pixel -t "{{custom lock screen text}}"`
+
+- Lock the screen, with a custom monitor off timeout in seconds:
+
+`betterlockscreen --off {{5}} -l`