How does one detach a process from a terminal?

paperwings

Okay I have asked this question on multiple IRC channels, and no one seems to know. I've had good luck here, though.

I have a research code that requires about 3-5 hours of runtime. How can I start the program from an SSH session from my home computer, detach it, but leave it running, and then close the SSH session?

I have tried the following:
1) Running in the bg using & -- still ends the program when the session is closed
2) expect -- but this pauses the program until you re-open the shell. I need it to keep running
3) VNC -- this works, but it seems clumsy.

I know there is an obvious, head-smacking way to do this. It seems like a fairly common task, especially in the past when everything required hours of runtime.

Thanks!

Naan Yaar · Bodhisattva Joined: 27 Jun 2002 Posts: 1549

If your program does not need console input, you can do:

kRock · n00b Joined: 28 May 2003 Posts: 73 Location: portland, or

^a^c creates a new screen
^a^n cycles between screens (previous)
^a^p cycles between screens (next)

screen -d -r will detach a currently attached screen session and bring it to your current terminal

screen -r resumes a detached session

See man screen for more options.
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grant.mcdorman · Posted: Tue Jul 08, 2003 10:46 pm Post subject: Detach background job (in bash)

paperwings · Posted: Wed Jul 09, 2003 12:32 am Post subject:

Thanks. It turns out the nohup route worked perfectly. No more waiting until the next day to restart my code when I realize at 9pm I had coded a bug!

sessionID · Posted: Wed Jul 09, 2003 11:22 am Post subject:

I use at to emere on remote machine & disconnect.
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