startx: add page (#8752)

pages/linux/startx.md

@@ -0,0 +1,20 @@
+# startx
+
+> The startx script is a front end to xinit that provides a nice user interface for running a single session of the X Window System.
+> More information: <https://x.org/releases/X11R7.5/doc/man/man1/startx.1.html>.
+
+- Start an X session:
+
+`startx`
+
+- Start an X session with a predefined depth value:
+
+`startx -- -depth {{value}}`
+
+- Start an X session with a predefined dpi value:
+
+`startx -- -dpi {{value}}`
+
+- Override the settings in the `.xinitrc` file and start a new X session:
+
+`startx /{{path/to/window_manager_or_desktop_environment}}`