I need to reduce the size on my Raspberry Pi boot SD card. I have read this posting Reverse the expand root FS and it embedded references, but as a near novice, I have a couple questions.
I can mount a USB memory stick on my Pi which is empty and bigger than the SD card being used to boot up the Pi. Can I run the process detailed in the above reference from that Pi, using the USB memory stick as the target for the process?
And then mount a second USB device with a micro SD card to do the final copy/creation of the new boot SD?