Google Cloud Shell脚本问题

Question

I am running my code from the shell(SSH) in google cloud as

python3 mycode.py

If I close the shell, the computation stops. How can I start a computation and then close the shell(Computation takes a long Time:)).....come back later and see how it is doing.

My code keeps printing results after a certain number of iteration.

Answer 1

Well, in general what you can do is run the code in a way where you can detach from the interactive environment. Using a tool such as screen or tmux . However, Google Cloud Shell is not made for running background tasks, and if i recall correctly, it will terminate after an hour.

You might need to provision a virtual machine to run it on instead. I can recommend using tmux. With tmux, it will be as simple as running tmux and then in the new shell running your script python3 mycode.py . You can then detach using ctrl+bd or simply disconnect. When you reconnect you run tmux attach -d to get back to your script.

Answer 2

I will provide you as well the following possibility:

A Bash Builtin command that you could also use is disown . First, run your process/script in the background (using & , or stopping it with ^Z and then restarting with bg ):

$ long_operation_command &
[1] 1156

Note that at this point the process is still linked to the session and in case it is closed it will be killed. You can the process attached to the session check running jobs in the background:

$ jobs
[1]+  Running  long_operation_command

Therefore you can run disown in order to detach the processes from the session:

$ disown

You can confirm this checking the result of your script or command logging in again or checking with top the process still running.

Check also this because it could be interesting, ie the difference between nohup foo , foo & and $ foo & disown