mysql is not prompted for a password

windows

installation

Install mysql on windows, click to learn how to download

problem

After installing mysql, open mysql shell, input mysql -u root -pcan, then enter the password you set. If you encounter the following interface
solution:

	Mysql JS>  \sql
	Mysql SQL>  \connect root@localhost

linux

installation

Take ubuntuan example

	sudo apt-get update
	sudo apt-get install python3-setuptools
	sudo apt-get install python3-dev
	sudo python3 setup.py install
 	sudo apt-get install mysql-server mysql-client

If you are asked to enter a password during the installation process, this password must be remembered!
Then enter the command

	mysql -u root -p

Enter the password you set to enter the database.

problem

You were not asked to set a password during the installation process.

fatpuffer@ubuntu:~/Downloads$ mysql -uroot -p
Enter password: 
ERROR 1698 (28000): Access denied for user 'root'@'localhost'

1. Enter sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf on the terminal of ubuntu, enter the configuration file, and then add skip- to the [mysqld] section of the configuration file The sentence grant-tables.

	[mysqld]
	#
	# * Basic Settings
	#
	user            　 = mysql
	pid-file        　 = /var/run/mysqld/mysqld.pid
	socket        　　 = /var/run/mysqld/mysqld.sock
	port            　 = 3306
	basedir        　　= /usr
	datadir       　　 = /var/lib/mysql
	tmpdir       　　　= /tmp
	lc-messages-dir   = /usr/share/mysql
	skip-external-locking
	character-set-server=utf8
	collation-server=utf8_general_ci
	skip-grant-tables

• The effect is that you can log in to mysql without a password.
• Save: wq, exit. Input: service mysql restart, restart mysql.

2. Enter mysql -u root -p on the terminal, and press Enter when you are prompted to enter the password. After entering mysql, execute the following three sentences:

	use mysql;   然后敲回车
	update user set authentication_string=password("你的密码") where user="root";  然后敲回车
	flush privileges;  然后敲回车

• Then enter quit to exit mysql.

3. Re-enter the mysqld.cnf file to comment out the skip-grant-tables statement added at the beginning.

	[mysqld]
	#
	# * Basic Settings
	#
	user            　 = mysql
	pid-file        　 = /var/run/mysqld/mysqld.pid
	socket        　　 = /var/run/mysqld/mysqld.sock
	port            　 = 3306
	basedir        　　= /usr
	datadir       　　 = /var/lib/mysql
	tmpdir       　　　= /tmp
	lc-messages-dir   = /usr/share/mysql
	skip-external-locking
	character-set-server=utf8
	collation-server=utf8_general_ci
	# skip-grant-tables

• Return to the terminal and enter mysql -uroot -p, and you should be able to enter the database.

• If an error is still reported at this time, then you need to return to step 3, re-validate the commented statement (that is, delete the # symbol), re-enter mysql, first select a database (use mysql), and then enterselect user,plugin from user

• It can be seen that after executing select user and plugin from user, the cause of the error is because the field of plugin root is auth_socket, then we can change it to the following mysql_native_password. enter:

update user set authentication_string=password("ln122920"),plugin='mysql_native_password' where user='root'

• Then press Enter to execute the following, and then enter

	 select user,plugin from user;

• Exit mysql

	\quit

• Restart mysql

	service mysql restart

Then this problem is completely solved.