For those who doesn't want their root password on Kali Linux live USB persistent login to be reset to the default 'toor',
Once you have changed your password using passwd root command, edit /lib/live/config/0031-root-password and comment out the line
before: usermod -p 'X014elvznJq7E' root
after: # usermod -p 'X014elvznJq7E' root
Want to start making money as a white hat hacker? Jump-start your white-hat hacking career with our 2020 Premium Ethical Hacking Certification Training Bundle from the new Null Byte Shop and get over 60 hours of training from ethical hacking professionals.