I'm not familiar with remote execution like this, but are you specifying
/zsh/ on the Windows side or is it somehow inherently being assumed for
the remote?  A quick little hack to try may be to copy the /zsh/
executable on Windows to /ash/ and see if it fools the remote side.

On 09/22/2016 07:00 AM, Colin Baxter wrote:
> On Thu, Sep 22 2016, Xi Shen wrote:
>
>> Instead of using ssh, I tried with scp. This time I got a different error.
>>
>> #+BEGIN_SRC shell :dir /scp:openwrt:/mnt/sda1
>> ls -al
>> #+END_SRC
>>
>> The error, I think, is from the remote end.
>>
>> /bin/sh: /bin/zsh: not found
>>
>> Clearly, I am using zsh on my Windows, but my remote OpenWRT system only has ash installed. Is
>> there's way to specify the shell to use on the remote end?
>>
> I can't help you here. I've never used openwrt. All I can suggest is to
> search openwrt documentation or try with cgywin.
>
> Good luck.