vncviewer: add page (#2401)

pages/linux/vncviewer.md

@@ -0,0 +1,19 @@
+# vncviewer
+
+> Launches a VNC (Virtual Network Computing) client.
+
+- Launch a VNC client which connects to a host on a given display:
+
+`vncviewer {{host}}:{{display_number}}`
+
+- Launch in full-screen mode:
+
+`vncviewer -FullScreen {{host}}:{{display_number}}`
+
+- Launch a VNC client with a specific screen geometry:
+
+`vncviewer --geometry {{width}}x{{height}} {{host}}:{{display_number}}`
+
+- Launch a VNC client which connects to a host on a given port:
+
+`vncviewer {{host}}::{{port}}`