connect colaboratory by ssh

colaboratory_ssh.txt

import random, string, urllib.request, json, getpass, time

#Generate root password
password = ''.join(random.choice(string.ascii_letters + string.digits) for i in range(20))

#Download ngrok
! wget -q -c -nc https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-linux-amd64.zip
! unzip -qq -n ngrok-stable-linux-amd64.zip

#Setup sshd
! apt-get install -qq -o=Dpkg::Use-Pty=0 openssh-server pwgen vim > /dev/null

#Set root password
! echo root:$password | chpasswd
! mkdir -p /var/run/sshd
! echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
! echo "PasswordAuthentication yes" >> /etc/ssh/sshd_config
! echo "LD_LIBRARY_PATH=/usr/lib64-nvidia" >> /root/.bashrc
! echo "PATH=/usr/local/cuda/bin:$PATH" >> /root/.bashrc
! echo "LD_LIBRARY_PATH=/usr/local/cuda/lib64:$LD_LIBRARY_PATH" >> /root/.bashrc
! echo "export PATH" >> /root/.bashrc
! echo "export LD_LIBRARY_PATH" >> /root/.bashrc

#Run sshd
get_ipython().system_raw('/usr/sbin/sshd -D &')

#Ask token
print("Copy authtoken from https://dashboard.ngrok.com/auth")
authtoken = getpass.getpass()

#Create tunnel
get_ipython().system_raw('./ngrok authtoken $authtoken && ./ngrok tcp 22 &')

#Wait for wake up sshd
time.sleep(2)

#Get public address and print connect command
with urllib.request.urlopen('http://localhost:4040/api/tunnels') as response:
  data = json.loads(response.read().decode())
  (host, port) = data['tunnels'][0]['public_url'][6:].split(':')
  print(f'SSH command: ssh -p{port} root@{host}')

#Print root password
print(f'Root password: {password}')