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

tldr/linux/dunstify

@@ -0,0 +1,26 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# dunstify
+
+> A notification tool that is an extension of `notify-send`, but has more features based around `dunst`.
+> Accepts all options of `notify-send`.
+> More information: <https://github.com/dunst-project/dunst/wiki/Guides>.
+
+- Show a notification with a given title and message:
+
+`dunstify "{{Title}}" "{{Message}}"`
+
+- Show a notification with specified urgency:
+
+`dunstify "{{Title}}" "{{Message}}" -u {{low|normal|critical}}`
+
+- Specify a message ID (overwrites any previous messages with the same ID):
+
+`dunstify "{{Title}}" "{{Message}}" -r {{123}}`
+
+- Display help:
+
+`notify-send --help`