xvfb

### BEGIN INIT INFO
# Provides: Xvfb
# Required-Start: $local_fs $remote_fs
# Required-Stop:
# X-Start-Before:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Loads X Virtual Frame Buffer
### END INIT INFO

XVFB=/usr/bin/Xvfb
XVFBARGS=":1 -screen 0 1024x768x24 -ac +extension GLX +render -noreset"
PIDFILE=/var/run/xvfb.pid
case "$1" in
  start)
    echo -n "Starting virtual X frame buffer: Xvfb"
    start-stop-daemon --start --quiet --pidfile $PIDFILE --make-pidfile --background --exec $XVFB -- $XVFBARGS
    echo "."
    ;;
  stop)
    echo -n "Stopping virtual X frame buffer: Xvfb"
    start-stop-daemon --stop --quiet --pidfile $PIDFILE
    echo "."
    ;;
  restart)
    $0 stop
    $0 start
    ;;
  *)
        echo "Usage: /etc/init.d/xvfb {start|stop|restart}"
        exit 1
esac

exit 0

First line should be #!/bin/sh

I must be missing something - getting insserv: script xvfb is not an executable regular file, skipped! - any idea?

@sebastiansulinski i had same problem i resolved it by following steps :
1:cd /etc/init.d/

2:sudo chmod +x xvfb
then you can try

sudo ./xvfb start

Doesn't start Xvfb after reboot

Did sudo update-rc.d xvfb defaults also.

EDIT: First line needs to be #!/bin/sh, otherwise wont work on boot Ubuntu 16.04