1. 获取可用用户名
$ sudo cat /etc/mysql/debian.cnf
可以看到该文件中的内容
[client]
host = localhost
user = debian-sys-maint
password = ********
socket = /var/run/mysqld/mysqld.sock
[mysql_upgrade]
host = localhost
user = debian-sys-maint
password = ********
socket = /var/run/mysqld/mysqld.sock
2. 使用该用户名进入mysql
$ mysql -u debian-sys-maint -p
Enter password:
3. 修改mysql数据库中的user表
用户名和密码存在该表中
$ update mysql.user set authentication_string=password('123qwe') \
> where user='root'
4. 重启mysql
$ service mysql restart
