download code from arduino to computer?

Projects General Guidance
1

Hi
Can I download code from arduino to computer?

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(deleted)

3

I only need to copy code from one to another Arduino. I do not need to read and rewrite. I need to copy it to the PC and then again on the other Arduino.
Can I do this?

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(deleted)

5

Usb and AVR ISP

7

Download:
avrdude -c -P <PORT(if needed)> -b <BAUD(if needed)> -p m328p -U flash:r:SaveFlash.hex:i

Upload:
avrdude -c -P <PORT(if needed)> -b <BAUD(if needed)> -p m328p -U flash:w:SaveFlash.hex:i

Download with uno bootloader:
avrdude -carduino -P -b115200 -p m328p -U flash:r:SaveFlash.hex:i