Mysql Upgrade Error

ERROR: Database files are locked. Daemon already running? Warning: Unable to start the server. Please restart MySQL and run mysql_upgrade to ensure the database is ready for use. site:www.digitalocean.com


An easy solution is to ```sudo killall mysqld``` while the apt-get operation is running.


# ps aux | grep mysql

# sudo kill #{process}


https://linuxconfig.org/disable-automatic-updates-on-ubuntu-18-04-bionic-beaver-linux
https://deivydas.com/how-to-reset-the-mysql-5-7-root-password-in-ubuntu-16-04-lts/

Where is the socket, run the comment in mysql
# show variables like 'socket';

https://stackoverflow.com/questions/39281594/error-1698-28000-access-denied-for-user-rootlocalhost