 
  Ubuntu 14.04
When trying to launch Selenium ChromeDriver with Python:
$ xvfb-run ipythonIn [3]: from selenium.webdriver import Chrome
In [4]: d = Chrome()
---------------------------------------------------------------------------
WebDriverException                            Traceback (most recent call last)
<ipython-input-4-0dc1ed148f2d> in <module>()
----> 1 d = Chrome()
/usr/local/lib/python2.7/dist-packages/selenium/webdriver/chrome/webdriver.pyc in __init__(self, executable_path, port, chrome_options, service_args, desired_capabilities, service_log_path)
    60                  service_args=service_args,
    61                  log_path=service_log_path)
---> 62                  self.service.start()
    63 
    64                  try:
/usr/local/lib/python2.7/dist-packages/selenium/webdriver/common/service.pyc in start(self)
    94                  count = 0
    95                  while True:
---> 96                      self.assert_process_still_running()
    97                      if self.is_connectable():
    98                          break
/usr/local/lib/python2.7/dist-packages/selenium/webdriver/common/service.pyc in assert_process_still_running(self)
    107                      raise WebDriverException(
    108                          'Service %s unexpectedly exited. Status code was: %s'
--> 109                          % (self.path, return_code)
    110                      )
    111 
WebDriverException: Message: Service chromedriver unexpectedly exited. Status code was: 127First, try launching chromedriver on its own:
$ chromedriver
chromedriver: error while loading shared libraries: libgconf-2.so.4: cannot open shared object file: No such file or directory→ Launch failed
Install libgconf2:
$ apt search libgconf
...
$ sudo apt install libgconf2-4Try launching chromedriver again:
$ chromedriver
Starting ChromeDriver 2.29.461571 (8a88bbe0775e2a23afda0ceaf2ef7ee74e822cc5) on port 9515
Only local connections are allowed.Launched successfully!
Run from Python again:
$ xvfb-run ipythonIn [1]: from selenium.webdriver import Chrome
In [2]: d = Chrome()
In [3]:Launched successfully!