I received an proxmark3 easy from Dangerous things. I followed:
When running any of the ./pm3 commands I get this:
[!] ERROR: invalid serial port /dev/ttyACM0
[?] Try the shell script
./pm3 --list to get a list of possible serial ports
I run this from my virtual box running ubuntu. I have run the make access rights. Any suggestions on what I may have missed?