m
avrdude -p atmega328p -P /dev/ttyACM0 -b 115200 -c arduino    -D -U flash:w:ch.hex
avrdude: ser_open(): can't open device "/dev/ttyACM0": No such file or directory

avrdude done.  Thank you.

Makefile:410: recipe for target 'program' failed
make: *** [program] Error 1