MariaDB设置初始化密码及修改密码

[root@localhost ~]# mysql -uroot
MariaDB [(none)]> use mysql;
MariaDB [mysql]> UPDATE mysql.user SET password = PASSWORD('newpassward') WHERE user = 'root';
MariaDB [mysql]> FLUSH PRIVILEGES;

[root@localhost ~]# mysql -uroot
MariaDB [(none)]> use mysql;
MariaDB [mysql]> SET password=PASSWORD('newpassward');
MariaDB [mysql]> FLUSH PRIVILEGES;

[root@localhost ~]# mysqladmin -u root password 'newpassword'
#如果root已经设置过密码，采用如下方法 
[root@localhost ~]# mysqladmin -u root -p 'oldpassword' password 'newpassword'