Re: running ssh/remote cmd in the background

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On Mon, Feb 27, 2017 at 11:44 PM, bruce <badouglas@xxxxxxxxx> wrote:
> On Mon, Feb 27, 2017 at 2:56 PM, Rick Stevens <ricks@xxxxxxxxxxxxxx> wrote:
>> On 02/27/2017 11:35 AM, Jon LaBadie wrote:
>>> On Mon, Feb 27, 2017 at 09:41:11AM -0800, Rick Stevens wrote:
>>>> On 02/26/2017 12:34 PM, bruce wrote:
>>>>> Hey Jon...
>>>>>
>>>>> You are absolutely correct.. if the parent ssh terminates.. the remote
>>> ...
>>>>
>>>> Jon, we try not to top-post here. Just a nudge.
>>>
>>> I didn't Rick, you attributed the above incorrectly.
>>>
>>>>
>>>> If you are using ssh to spawn a remote screen session that runs a
>>>> command in the background it should work just fine, e.g.:
>>>>
>>>>      ssh user@remote "screen command-to-run args &"
>>>
>>> I replied to the original post and the screen command was never mentioned.
>>
>> OOPS! My mistake. I should have poked Bruce. Sorry, Jon.
>
> hey... no poking in here!!!
>


More clarification....

The following works...
  ssh -t crawl_user@1.2.3.4 cp /foot/start.php /ctmp/.

Howvever, i've been putzing with a way to have the local ssh run in
the background, with no success...

  ssh -t crawl_user@1.2.3.4 "cp /foot/start.php /ctmp/. " &

Seems to place the ssh in the background (ps -aux) shows it running,
but it never dies..

I've tried different approaches > \dev\null & etc.. with little luck...

Here's why Im looking to do this:

My use case/test has a bunch of digital ocean droplets, and the
process has a number of things that ned to be done to each droplet on
initialization (I know, whynot create a base instance with what's
needed, and clone that one!)

So the current process does a simple loop through the init process,
doing the remote/ssh into the target instances... This process works,
but is time consuming. So I've wondered how one could run a local ssh
in the background, which would/should allow the process to run
faster...

loop
  (ssh user@ip1 remote_process_1) & so the entire local ssh process
runs as a background
  (ssh user@ip1 remote_process_2) & so the entire local ssh process
runs as a background
  (ssh user@ip1 remote_process_3) & so the entire local ssh process
runs as a background
  .
  .
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