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$ head -1000 /etc/conf.d/xvfb* /etc/init.d/{xvfb,selenium-daemon}
==> /etc/conf.d/xvfb <==
XVFB=/usr/bin/Xvfb
XVFBARGS=":90 -auth /etc/conf.d/xvfb.cfg -nolisten tcp"
PIDFILE=/var/run/xvfb.pid 

==> /etc/conf.d/xvfb.cfg <==
localhost

==> /etc/init.d/xvfb <==

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XVFB=/usr/bin/Xvfb
XVFBARGS=":100 -screen 0 1600x1200x24 -auth /etc/conf.d/Xvfb.cfg -nolisten tcp"
PIDFILE=/var/run/Xvfb.pid 

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from selenium import webdriver

from selenium.webdriver.remote.remote_connection import RemoteConnection
from selenium.webdriver.remote.errorhandler import ErrorHandler
from selenium.webdriver.remote.command import Command

class PersistentWebdriver (webdriver.Remote):
    
    def __init__(self, session_id=None, browser_name=''):
        command_executor='http://localhost:4444/wd/hub'

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#!/bin/bash -ue

# Dependencies (list might be incomplete):
# src/libevent-2.0.21-stable.tar.gz
# src/libsearpc (I used git f022c6509cff2eb604024c003eb60bcda975c0b1)
# src/ccnet (with Nicolas' patches, I used 3495a78466add16cfa9eddfb35a312bb9ce55264)
# src/seafile (with Nicolas' patches, I used 59eb918655dfa5f1328ec72be00681c6192f523d)
#
# Toolchain:
# vala (vala-0.18.1-1.fc18.x86_64)

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plot.nnet<-function(mod.in,nid=T,all.out=T,all.in=T,bias=T,wts.only=F,rel.rsc=5,
                    circle.cex=5,node.labs=T,var.labs=T,x.lab=NULL,y.lab=NULL,
                    line.stag=NULL,struct=NULL,cex.val=1,alpha.val=1,
                    circle.col='lightblue',pos.col='black',neg.col='grey',
                    bord.col='lightblue', max.sp = F,...){

  require(scales)
  
  #sanity checks
  if('mlp' %in% class(mod.in)) warning('Bias layer not applicable for rsnns object')

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Google cloud's ssh command lets you pass standard ssh flags. To, for example, forward local port 8088 to port 8088 on a vm instance, all you need to do is:

gcloud compute  ssh --ssh-flag="-L 8088:localhost:8088"  --zone "us-central1-b" "example_instance_name"

Now browsing to localhost:8088 works as it would with standard ssh.