How do I programatically control a Chrome instance from the command line?

How do I control a running Google Chrome instance fr开发者_如何学编程om the command line? I'm hoping there's something like a -remote flag that will allow me to send in some javascript or somesuch. In particular, I would like to reload the topmost document on the foremost window.

I'm especially interested in Linux/MacOS solutions.

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Take a look at http://code.google.com/p/chromedevtools/ . It might be you can use the Debugging Protocol to do the job. There is also an Ruby Client. There is also chromix.

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You can use this command line tool if you're on a Mac - it uses the Chrome Scripting API, I guess

https://github.com/prasmussen/chrome-cli