关闭命令提示符或腻子后如何保持 julia 运行

Question

I am running a big julia simulation in AWS machine (linux). I use putty to run from the command line.

I type: julia myscript.jl

However, whenever I close the command prompt, or putty or my laptop, the run on the AWS server will stop. I wonder if anyone knows is there a way to keep julia running when I close the command line prompt. As I do not want to keep my laptop open and putty stay connected for several days

Thanks

Answer 1

dtach exists for this purpose. It will keep a process alive even if the terminal session that created the process is closed.

Once you log in through ssh, start a new dtach session:

$ dtach -A /tmp/my-dtach-session julia myscript.jl

Then detach from the session with ctrl+\\ .

Detaching will not kill your process. Here I check that it is still running after detaching:

[david@blue ~] $ ps aux | grep dtach                                       
david      506  0.0  0.0   8460  1484 ?        Ss   16:15   0:00 dtach -A /tmp/my-dtach-session ./pkg/julia-1.3.0/bin/julia
david      517  0.0  0.0   6140  2224 pts/2    S+   16:16   0:00 grep dtach

After you detach, you can close your ssh session like normal. If your process has not finished, you can log back in and reattach:

$ dtach -a /tmp/my-dtach-session