$ pkill Xvnc
$ pkill Xrealvnc
$ sh -c "rm -f /tmp/.X*-lock /tmp/.X11-unix/X*"
[se.platform.ui_R4_30_maintenance] $ Xvnc -help
Starting xvnc
[se.platform.ui_R4_30_maintenance] $ Xvnc :15 -geometry 1024x768 -depth 24 -ac -SecurityTypes none -noreset
Xvnc TigerVNC 1.11.0 - built Jul 21 2021 11:25:16
Copyright (C) 1999-2020 TigerVNC Team and many others (see README.rst)
See https://www.tigervnc.org for information on TigerVNC.
Underlying X server release 12011000, The X.Org Foundation
Fri Dec 1 05:13:53 2023
vncext: VNC extension running!
vncext: Listening for VNC connections on all interface(s), port 5915
vncext: created VNC server for screen 0
Fri Dec 1 05:57:36 2023
ComparingUpdateTracker: 0 pixels in / 0 pixels out
ComparingUpdateTracker: (1:-nan ratio)