Is there a way in Linux (or UNIX and its cousins in general) to run a
process (like a long, gnarled process that can take several hours/days),
and detatch it from a shell such that it runs in the background (with
stdin/out going to a file)?
And to be somewhat more specific - how do you do it so you can
re-attatch to the process later?
Specifics:
I would like to be able to:
* Start a HDL synthesis running in the background of a computer.
* Log out of the computer entirely, leaving that process (and
subprocesses) running.
* Log back in later (hours, days) and either re-enter the program just
as I left it, or view all the log files.
This is a problem for many of us working at my university's Sunlab (We
call it such because they have Sun workstations). Those of us who have
to run these HDL synthesis processes (although there are other
simulation apps that need this ability as well) would like to be able to
start our process, logout, and leave. This way, the actual workstation
is still accessible to anybody else who needs it, will be able to use
it. Sure, programs may run a bit (OK, a *lot*) slower - but that is a
vast improvement over a lab full of 'locked' machines; espescially since
not everybody even needs to use the machines for CPU/memory-intensive
operations.
I'm thinking this may be possible (somewhat) using 'nohup'
But is there anything else that allows this?
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