# Error  code with Kernel (Remote Kernel time out)

**URL:** <https://community.wolfram.com/t/error-code-with-kernel-remote-kernel-time-out/2065>\
**Category:** Questions\
**Tags:** mathematica, external-interfaces\
**Created:** [April 25, 2014, 9:21pm UTC](https://community.wolfram.com/t/error-code-with-kernel-remote-kernel-time-out/2065 "2014-04-25T21:21:43Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![josecalderon](https://yyz1.discourse-cdn.com/wolfram/user_avatar/community.wolfram.com/josecalderon/32/34904_2.png) [@josecalderon](https://community.wolfram.com/u/josecalderon)\
**Post date:** [April 25, 2014, 9:21pm UTC](https://community.wolfram.com/t/error-code-with-kernel-remote-kernel-time-out/2065/1 "2014-04-25T21:21:43Z")

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I am getting this error and have no idea what it is.

```auto
SubKernels`RemoteKernels`LaunchRemote::rsh: Command rsh SFDI_triger -n -l jecalderon "math -mathlink -linkmode Connect -linkprotocol TCPIP -linkname 49323@136.145.61.129,49324@136.145.61.129 -subkernel -noinit >& /dev/null &" may have failed (exit code 1).

SubKernels`Protected`kernelFlush::time: Operation LinkWrite timed out after 15.` seconds.

KernelObject::rdead: "Subkernel connected through \!\(\"remote\"[\"SFDI_triger\"]\) appears dead"

```

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<div class="post-metadata">

**Author:** ![brucem](https://yyz1.discourse-cdn.com/wolfram/user_avatar/community.wolfram.com/brucem/32/26319_2.png) [@brucem](https://community.wolfram.com/u/brucem)\
**Post date:** [April 28, 2014, 5:29pm UTC](https://community.wolfram.com/t/error-code-with-kernel-remote-kernel-time-out/2065/2 "2014-04-28T17:29:06Z")

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Is rsh secure enough on your machines? “ssh” is more common now.

Can you log in remotely from one machine to the other (with ssh) and run the Mathematica Kernel that way?

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<div class="post-metadata">

**Author:** ![josecalderon](https://yyz1.discourse-cdn.com/wolfram/user_avatar/community.wolfram.com/josecalderon/32/34904_2.png) [@josecalderon](https://community.wolfram.com/u/josecalderon)\
**Post date:** [May 14, 2014, 4:27pm UTC](https://community.wolfram.com/t/error-code-with-kernel-remote-kernel-time-out/2065/3 "2014-05-14T16:27:50Z")

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No…I am not sure how this is een done. I have installed the Putty. But this is a client. I am not sure how to set up server ssh.

I am assuming this is a required or does mathematica has its own ssh server in the installation?