What does virtual memory hack do? also

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Vm crasa virtual page file so whenyou run low on ram the data is stored in the age file instead and the page file gets larger as needed so things don't quit in orde to free up memory. Ssh is just a way to access the file system on your ipad as far as i know. If you jailbreak and install openssh then you can use a FTP client like cyberduck to transfer files to and from the iPad

 

Does this VM works on Iphone too?

 

Yes it does, but really isn't necessary because the iP4 has twice the ram compared to the iPad.

Oops... That's assuming if you have an iP4. If you have a 3G or 3Gs it works wonders. Not so much on the 2G.