it gives me this error
avrdude: ser_open(): can't open device "/dev/ttyUSB0": Permission denied
PLEASE HELP!!!!
it gives me this error
avrdude: ser_open(): can't open device "/dev/ttyUSB0": Permission denied
PLEASE HELP!!!!
Looks like you do not have permission, as the error message says; for some operations avrdude needs root privileges.
To solve: add sudo in front of the command you used.
Add yourself to the serial port user group:
sudo usermod -a -G dialout yourusername
and then reboot.
Depending on your distro, the name of the group might change to uucp or something else.