Update cheatsheets

linux/swaybg

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# swaybg
+
+> Wallpaper tool for Wayland compositors.
+> More information: <https://github.com/swaywm/swaybg/blob/master/swaybg.1.scd>.
+
+- Set the wallpaper to an [i]mage:
+
+`swaybg --image {{path/to/image}}`
+
+- Set the wallpaper [m]ode:
+
+`swaybg --image {{path/to/image}} --mode {{stretch|fit|fill|center|tile|solid_color}}`
+
+- Set the wallpaper to a static [c]olor:
+
+`swaybg --color {{"#rrggbb"}}`