Really into the backgroung...

Really into the backgroung...

[meino.cramer]

Hi,

I run into the following situation:

>From my Linux-PC I have a ssh-connection to a single-board
Linux computer (Beaglebone Black). On my PC and on the 
Beaglebone zsh is the system shell.

>From my Linux PC I started on my Beaglebone the (native)
compilation of the Linux kernel.

This will take about eight hours...

I need to reboot my Linux PC for testing purposes and
I dont want until midnight... ;)

Is there any chance to detach the running process, which
compiles the kernel, from the ssh-session in a way that
I am able to reboot the PC without breaking the kernel
compilation (I cannot restart the compilation by hand...
because it is steered by a custumized script) ? ???

Best would be if I could reconnect to it afterwards...


Thank you very much in advance for any help!
Best regards,
mcc

Re: Really into the backgroung...

[Timo Schmidt]

On Sun 11.08.2013 14:47, meino.cramer@gmx.de wrote:
> 
> Is there any chance to detach the running process, which
> compiles the kernel, from the ssh-session in a way that
> I am able to reboot the PC without breaking the kernel
> compilation

Use tmux or screen.

  -Timo

Re: Really into the backgroung...

[Benjamin R. Haskell]

[-- Attachment #1: Type: TEXT/PLAIN, Size: 1130 bytes --]

On Sun, 11 Aug 2013, Timo Schmidt wrote:

> On Sun 11.08.2013 14:47, meino.cramer@gmx.de wrote:
>>
>> Is there any chance to detach the running process, which compiles the 
>> kernel, from the ssh-session in a way that I am able to reboot the PC 
>> without breaking the kernel compilation
>
> Use tmux or screen.

`dtach` and `reptyr` are other lesser-known tools that support just the 
attach/detach functionality of `tmux` or `screen` (which are basically 
terminal window managers).  `dvtm`¹ ("dynamic virtual terminal manager") 
is another alternative in that realm.

`dtach`² (as the name implies) just supports the attaching and detaching 
feature.

The problem with `tmux`, `screen`, and `dtach` is that you have to use 
it before your process is running.  If you've forgotten to tmux- or 
screen-ify the process beforehand, you might try `reptyr`³ (It "re-" 
"pty"'s a program.)  It's Linux-only, and uses ptrace(2) hackery to 
attach a process running on a different pty to a new one.

-- 
Best,
Ben

¹: http://www.brain-dump.org/projects/dvtm/
²: http://dtach.sourceforge.net/
³: https://github.com/nelhage/reptyr

Re: Really into the backgroung...

[Yuri D'Elia]

On 08/11/2013 07:56 PM, Benjamin R. Haskell wrote:
> The problem with `tmux`, `screen`, and `dtach` is that you have to use
> it before your process is running.  If you've forgotten to tmux- or
> screen-ify the process beforehand, you might try `reptyr`³ (It "re-"
> "pty"'s a program.)  It's Linux-only, and uses ptrace(2) hackery to
> attach a process running on a different pty to a new one.

reptyr is awesome. Though a big limitation is that currently can only
re-attach processes without children (which happens a lot more than one
might expect).