How to increase the size of root (/) on an ubuntu installer ISO

[Peter Flynn]

On 29/12/2019 11:36, Ken D'Ambrosio wrote:
> On 2019-12-28 21:35, Harry Putnam wrote:
>> I'd like to increase the size of the root filesystem on Focal
>> Fossa install *.iso
> 
> I'm a little confused. You want to increase the size of / on the live
> install boot image? Pretty sure the answer is, "You don't."

I'm a little confused too.

Ken is right: on the boot image itself you can only do this by 
recompiling the ISO image with revised boot code that creates a larger 
temporary environment in RAM. If you know how to do this, and you know 
your target machine is big enough to handle it, go right ahead and 
reburn the recompiled ISO image.

The only other thing I can think of it meaning is that you want to 
increase the size of the / partition that gets installed to hard disk. 
This is puzzling because the default on new machines is to use all the 
disk space anyway. If your target system has more physical disks that 
are not being used, I think you can click the installer option to use 
all available disk space (if older OSs were installed there, you have to 
confirm that you want them overwritten).

Or did you mean something else what we have misunderstood?

P