xeyes: add page (#1256)

pages/linux/xeyes.md

@@ -0,0 +1,11 @@
+# xeyes
+
+> Display eyes on the screen that follow the mouse cursor.
+
+- Launch xeyes on local display:
+
+`xeyes`
+
+- Launch xeyes on a remote display 0 screen 0:
+
+`xeyes -display {{remote_host}}:{{0}}.{{0}}`