cmd.exe is returning a "The system cannot find the path specified." error when the automationtool is looking for PLINK.exe. That executable should be located in \UE_4.15\Engine\Extras\ThirdPartyNotUE\putty\, but this folder is not included in binary builds. The folder does exist in GitHub and Perforce builds.
I spoke to RCL and this needs to be included.
Launching onto the Linux machine fails during the build phase when the automationtool tries to run PLINK.exe located inside \UE4\Engine\Extras\ThirdPartyNotUE\putty\.
Successful launch on to the Linux machine from a Windows machine.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-41474 in the post.