Google colab is a good option to experiment and try heavy computational tasks on a high end computer for free. Notebook interface provided by google is perfect python programs.

I have made a script to connect to colab instance with just few comands.

What you need ?

ngrok Account ssh public key

Go to https://ngrok.com and create an account and copy the authtoken only

$ ./ngrok authtoken ZT64bWYnXsdTAdfdassJej4FNFT_2auAQqKqZHn2Sh4g2sfAD

we need only bold text from above.

for second option : run ssh-keygen and just press enter 3–4 times if it asks for anything

and then copy the public key

run cat .ssh/id_rsa.pub

reference is here

now open google colab, connect to desired runtime type and execute following commands in notebook cell:

! wget https://gist.githubusercontent.com/archie9211/ae3c8411da88ae8b2a05b0ee1a4fd412/raw/ee1a6e78fc498ad6d4830cd2eb6033839235ea8a/colab-ssh-jupyter.sh !bash colab-ssh-jupyter.sh

Enter the authtoken and ssh public key when prompt asks respectively.

it will print the ssh command to connect to colab instance. e.g

ssh root@0.tcp.ngrok.io -p 16826 # it will be different for your case

Open terminal in your local pc and run the command you get on colab.

you will get a bash shell logged in to colab instance. for jupyterlab, first install following on the terminal :

pip3 install jupyterlab && apt install tmux

now run tmux and tun following command in it: (chose port of your choice {I prefer 5 digit random number})

jupyter lab --ip 0.0.0.0 --port 56784

now press ctrl + b and then “ to split split window and then run follow in new window: (use the same port you used for jupyter lab)

ssh -R 80:localhost:56784 ssh.serveo.net

if this doesnot work, try this instead :

ssh -R 80:localhost:56784 something@ssh.localhost.run

EDIT: serveo.net is down, You can try ssh.serveo.net

You should get a URL after this on terminal open this in browser and you should get your jupyter lab on browser connected to google colab instance.

To minimize tmux on terminal, press ctrl+b and then d.

Script used :

For any query/doubt or correction, please comment below.

Also read this post at : here

Thanks.