Ruby on Rails

Jordon Bedwell wrote in post #1120860:
> On Fri, Sep 6, 2013 at 2:15 PM, Love U Ruby <lists@ruby-forum.com>
> wrote:
>> => "/home/kirti\n"
> Because Kernel#` is a fork per command scenario not a session. `cd
> 'ruby' && pwd`

fork per command means? Could you please clarify this ? I am using it
first time.

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