改密码的几种方式
1.命令行下
mysqladmin -uroot -p就密码 password '新密码'
2.在数据库服务器上
1) mysql> alter user root@"localhost" identified by '123qqq...A';
2) mysql> set password=password("123qqq...A");
3) mysql> set password for root@"localhost"=password("123qqq...A");
4)mysql> alter user user() identified by "123qqq...A"; //当前登陆的用户
3. 不知道密码的情况下修改密码
~]# vim /etc/my.cnf
skip_grant_tables
~]# systemctl restart mysqld
~]# mysql
mysql> update mysql.user set authentication_string=password("123qqq...B") where user="root" and host="localhost";
mysql> flush privileges