Uploading error (Ubuntu 18.04)

Hello everyone.
Today ,I have a problem using arduino nano.It can't upload anything (compiling hasn't any errors).
Port is connected,restart of arduino , laptop,but these didn't solve the problem I have.

Ubuntu Linux 18.04
Arduino nano
Processor: ATmega 328P
Port: /dev/tty/USB0
Programmer: AVRISP mkll

Error output:


What do you suggest me to do?
If you need more info ,tell me...

Select Tools > Processor > ATmega328P (Old Bootloader) and then try uploading again.

Ok,it works.Thank you vey much!!!

You're welcome. I'm glad to hear it's working now. Enjoy!