Make an image of an android phone using Linux?

[Linux for blind general discussion]

I'm pretty sure it depends on the manufacturer and possibly
distributing carrier of the phone. Ideally, the phone would act like a
USB mass storage device that gives the host machine full access to the
phone's internal storage, but most phone makers are probably too
paranoid about consumers doing things they don't approve of and have
likely crippled access to the internal storage, limiting USB mass
storage access to the android equivalent of a home partition/directory
if not requiring specialized software to access internal storage or
blocking access entirely.

So yeah, you'll probably need to use something on the phone itself,
and even there, you might run into your phone's maker trying to make
life harder for no adequately explained reason.

-- 
Sincerely,

Jeffery Wright
Bachelor of Computer Science
President Emeritus, Nu Nu Chapter, Phi Theta Kappa.