xvfb init script for Ubuntu

xvfb

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

@AmrinderTweddle nice, but missing esac

Hi, i started Xvfb and after start tests i received:

org.openqa.selenium.firefox.NotConnectedException: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:
XPCOMGlueLoad error for file /home/jenkins/firefox/libmozgtk.so:
libgtk-3.so.0: cannot open shared object file: No such file or directory
Couldn't load XPCOM.

Firefox 46.01, Selenium 2.53.1
i haven't any problems with the same versions Firefox and Selenium on local machine
any ideas ?

I'm suddenly getting following error. Script worked before:

/etc/init.d/xvfb: line 4: syntax error near unexpected token `$'in\r''
'etc/init.d/xvfb: line 4: `case "$1" in

any ideas what could be wrong?

Edit:
It was windows line endings. Fixed it with sed -i 's/\r//' /etc/init.d/xvfb

Just for the interested.
I created the following little script that works like a charm...

#!/bin/bash
(
    trap 'kill $ids' EXIT
    
    Xvfb :8 -screen 8 1920x1080x24 -ac +extension GLX +render -noreset > /dev/null 2>&! &
    ids="$ids $!"

    DISPLAY=:8 java -Dwebdriver.gecko.driver=/<path to>/geckodriver -Dchrome.binary=/opt/google/chrome/chrome -Dwebdriver.chrome.bin=/usr/bin/google-chrome -Dwebdriver.chrome.driver=/<path to>/chromedriver -jar /<path to selenium>.jar -host 127.0.0.1 -port 4444 > /dev/null 2>&1 &
    ids="$ids  $!"

    echo -e "\e[35m\e[1mSpinning up Selenium Server\e[0m"
    while ! nc -z localhost 4444; do echo -en ".\e[0m" && sleep 1; done

    #Your code here!#
)

What this does is that it launches Xvfb in the background and set the PID as a var.
The same happens with selenium..

Then it waits for selenium to be fully up and running by pinging the port until a valid response is received and only when that happens, then the rest of the code start..

As soon as all your code has been executed, regardless of the exit code, Xvfb is then shut down as well as Selenium forcing a clean session every time...

Thank you, very much!!!

How to render the environment in Google Colab?

xfvb-run with reset option fails with out of memory error. Did anyone fix this?