Wake On Lan from Touch

I have a Touch that I usually use with an SD card. That works fine.

If I want to connect to my music server that also works providing the server is up. If the server is down, and the last time I powered down the Touch it was connected to the server, and I turn on the Touch, it sends a Wake On Lan (WOL) to wake the server up. All good so far.

However, if the Touch was connected to the SD card when it was powered off, when it is powered up it does not send a WOL to the server, and there seems to be no way of persuading it to do so (including trying to add a library at the server's network address).

So what I need is a way of sending a WOL from the Touch to my server when I want to. Is there a Touch 'App' that would help? I looked but couldn't find one. Alternatively, is there a way of running a local linux command from the Touch screen? I might be able to create a linux command to do what I want, if only I could run it.

Any ideas out there?

I know many people never power stuff down, but I prefer to do so.