Move pages under tldr, lint run.sh, update docs

tldr/linux/xrandr

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# xrandr
+
+> Set the size, orientation and/or reflection of the outputs for a screen.
+> More information: <https://www.x.org/releases/current/doc/man/man1/xrandr.1.xhtml>.
+
+- Display the current state of the system (known screens, resolutions, ...):
+
+`xrandr --query`
+
+- Disable disconnected outputs and enable connected ones with default settings:
+
+`xrandr --auto`
+
+- Change the resolution and update frequency of DisplayPort 1 to 1920x1080, 60Hz:
+
+`xrandr --output {{DP1}} --mode {{1920x1080}} --rate {{60}}`
+
+- Set the resolution of HDMI2 to 1280x1024 and put it on the right of DP1:
+
+`xrandr --output {{HDMI2}} --mode {{1280x1024}} --right-of {{DP1}}`
+
+- Disable the VGA1 output:
+
+`xrandr --output {{VGA1}} --off`
+
+- Set the brightness for LVDS1 to 50%:
+
+`xrandr --output {{LVDS1}} --brightness {{0.5}}`