# Connect to remote kernels with ssh in MMA 11.2.0

I used these code in this post remote kernel through SSH

Needs["SubKernelsRemoteKernels"]
ParallelSettings$MathLinkTimeout = 100 user = "user"; ssh = "export LD_LIBRARY_PATH=;ssh";(*ssh program name.If you install \ GOW on Windows,then this should work,otherwise put the path \ yourself*) math = "MathKernel" <> " -wstp -linkmode Connect 4 -linkname 2 -subkernel -noinit >& \ /dev/null &"; number = 2;(*number of parallel kernels to launch*) machine = "ipv6 addr"; remote = SubKernelsRemoteKernelsRemoteMachine[machine, ssh <> " " <> user <> "@" <> machine <> " " <> " \"" <> math <> "\"", number] Print[remote // InputForm] kerns = LaunchKernels[remote] ParallelEvaluate[$MachineName]


but I can't get those kernels started, and I got a General::time: Operation LaunchKernels timed out after 10. seconds. error. BTW I used rsa keys so no password is required.

My MMA version is 11.2.0, and I'm connecting lower version (11.0.0). I tested connection between two 11.0.0 with the same code and everything worked out fine.

I used ipv6 but I don't think that's the issue here, since in 11.0.0 everything worked out fine.

I also tried connecting two 11.2.0 machine and got

LinkConnect::linkc: