is it possible to "upgrade" a linux box, by just overwriting everything from an other ISO?

[robert rottermann]

Hi there,

I have a minix appliance (neo z64, intel Z3735F) with android KitKat 4.4.4.

Now I would like to install a Linux onto it.

I managed to install ubuntu 14.1 and 16.04 by creating bootable stick. 
although with both OS'ses no network is found.

What I really would like to do, is to install an actual version of ipfire.

Unfortunately I could not make the appliance boot from the stick, when 
the stick was created with ipfire.

I believe, this is because the appliance needs an uefi boot sequence, 
which ipfire does not provide


now some questions:

is it possible to copy the uefi stuff from say selinux, to make the 
stick provide an uefi boot sequenc?

if not, can I just clean out everything from ubuntu and replace it with 
ipfire some how.


thanks

robert