ubuntu no password or forgotten password Solution When first install mysql

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This article is mounted directly solve the Ubuntu command line when installing MySQL, the root password is not initialized question
1. First, enter the following command

sudo cat /etc/mysql/debian.cnf

2. Enter the following commands

mysql -u debian-sys-maint -p

// Note! This instruction password is entered in the password information obtained in the first instruction = ZCt7QB7d8O3rFKQZ come
// please fill out according to their actual situation!

3. To change the password, the password to modify this article to root, user definable

1. use mysql; 
2.//下面这句命令有点长，务必注意 update mysql.user set
3.authentication_string=password('root') where user='root' and Host
4.='localhost'; update user set plugin="mysql_native_password";  flush privileges;

4. Restart mysql:

Service restart MySQL 1.sudo
2.mysql -u root -p
After starting the input 3.// have modified a good password: root