Copy&paste your tunnel authtoken from https://dashboard.ngrok.com/auth
(You need to sign up for ngrok and login,)
··········
Select your ngrok region:
us - United States (Ohio)
eu - Europe (Frankfurt)
ap - Asia/Pacific (Singapore)
au - Australia (Sydney)
sa - South America (Sao Paulo)
jp - Japan (Tokyo)
in - India (Mumbai)
India
Install openssh-server
---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
<ipython-input-2-cf1739e17346> in <module>()
      1 get_ipython().system('pip install git+https://github.com/demotomohiro/remocolab.git')
      2 import remocolab
----> 3 remocolab.setupSSHD()

/usr/local/lib/python3.6/dist-packages/remocolab.py in setupSSHD(ngrok_region, check_gpu_available
  146 
    147 def setupSSHD(ngrok_region = None, check_gpu_available = False):
--> 148   s, msg = _setupSSHDMain(ngrok_region, check_gpu_available)
    149   print(msg)
    150 

/usr/local/lib/python3.6/dist-packages/remocolab.py in _setupSSHDMain(ngrok_region, check_gpu_available)
    143     ngrok_region = region = input()
    144 
--> 145   return (True, _setupSSHDImpl(ngrok_token, ngrok_region))
    146 
    147 def setupSSHD(ngrok_region = None, check_gpu_available = False):

/usr/local/lib/python3.6/dist-packages/remocolab.py in _setupSSHDImpl(ngrok_token, ngrok_region)
    100   time.sleep(2)
    101   if ngrok_proc.poll() != None:
--> 102     raise RuntimeError("Failed to run ngrok. Return code:" + str(ngrok_proc.returncode) + "\nSee runtime log for more info.")
    103 
    104   with urllib.request.urlopen("http://localhost:4040/api/tunnels") as response: