Error when running apt-get upgrade after update

The error is error message indicates a disk full error

  1. check current kernal version by : uname -a
  2. cd /boot
  3. ls -al
  4. try del the files which version is not current kernal version .
  5. try 'sudo apt-get autoremove'
  6. try sudo apt --fix-broken install
  7. try sudo apt-get update
  8. try sudo apt-get upgrade