Reset password mysql 5.7

mysql-reset-root-password.sh

#!/usr/bin/env bash
set -x
set -e
sudo service mysql stop || echo "mysql not stopped"
sudo stop mysql-5.6 || echo "mysql-5.6 not stopped"
sudo  mysqld_safe --skip-grant-tables &
sleep 4
sudo mysql -e "use mysql; update user set authentication_string=PASSWORD('') where User='root'; update user set plugin='mysql_native_password';FLUSH PRIVILEGES;"
sudo kill -9 `sudo cat /var/lib/mysql/mysqld_safe.pid`
sudo kill -9 `sudo cat /var/run/mysqld/mysqld.pid`
sudo service mysql restart
sleep 4

https://medium.com/@mtparet/install-mysql-server-5-7-on-travis-96f2ebc0f339#.xk3jalgst