maim: add page (#4468)

pages/linux/maim.md

@@ -0,0 +1,20 @@
+# maim
+
+> Screenshot utility.
+> More information: <https://github.com/naelstrof/maim>.
+
+- Capture a screenshot and save it to the given path:
+
+`maim {{path/to/screenshot.png}}`
+
+- Capture a screenshot of the selected region:
+
+`maim --select {{path/to/screenshot.png}}`
+
+- Capture a screenshot of the selected region and save it in the clipboard (requires `xclip`):
+
+`maim --select | xclip -selection clipboard -target image/png`
+
+- Capture a screenshot of the current active window (requires `xdotool`):
+
+`maim --window $(xdotool getactivewindow) {{path/to/screenshot.png}}`