Install avrdude.
sudo apt update
sudo apt -y install avrdude
Please provide a correct path to .hex file.
Also correct name of ttyUSB interface has to be provided. Then run avrdude.
avrdude -v -patmega1284p -carduino -P/dev/ttyUSB0 -b57600 -D -Uflash:w:./build/AIRDOS.hex:i