How to change the MySQL root account password on CentOS7?

Question

I have installed mySQL on a Centos7 vm but I have problems logging in with root. I tried logging in without password or tried any default ones (like mysql, admin etc) I look

Answer 1

For CentOS 7 and MariaDB 10.4, I had success with the following commands:

su -
systemctl set-environment MYSQLD_OPTS="--skip-grant-tables --user=mysql"
systemctl restart mariadb
mysql -u root

flush privileges;
ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';
flush privileges;
quit

systemctl unset-environment MYSQLD_OPTS
systemctl restart mariadb