So I bit the bullet and gave up on Armory working on Mac.  I bought my ubuntu machine.  Found the external drive. (The one I used to use on Mac.)

but could not Write to the bitcoin directory and I am sure the Armory directory when I get to it.  I still have access to the Mac.

Is it safe to just change the permissions on the bitcoin and armory directory to 666?

Or is there a way to change the owner of the file on the Mac so the Ubuntu user can set it to what ever it needs to be? And what should it be?

Should I just buy another harddrive and copy the blockchain across, how do I do that to have the ubuntu user as the owner of the new files and hard disk?

Or download the whole blockchain again?  (please no)

What is quickest for a tech struggler like me?

Thanks in advance.