Loss of MySql permissions problem-solving

Reference article

[Mysql] root privileges restored completely lost rookie tutorial

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After today, log on to mysql with root account, show databasesthe command returns only two tables, and then use the use database command prompt I do not have permission;
problem shown in (I use the root account login):

Internet to find some missing permissions problem solving blog to solve the problem

Proceed as follows:

• Shut down mysql service, systemctl stop mysqld

• Modify the configuration file mysql the my.cnf (can mysql --help|grep 'my.cnf'see the my.cnf ** ** path command) is added in the last line of the following code:skip-grant-tables

• Save, start MySQL ( systemctl start mysqld)

• Log mysql -> mysql -u root -p
  prompted for a password do not enter anything directly enter , so skip the permissions check log in directly to the mysql;

• use mysql
  (At this time we need to give root privileges to update)

• update user set Update_priv=‘Y’ where user=‘root';
  (Then the permissions set permissions )

• update user set Grant_priv =’Y’ where user = ‘root';Giving it the highest authority #
  flush privileges;# refresh permission

• grant all privileges on *.* to root@'localhost' identified by "123" with grant option; # 123 is the password

• flush privileges; # Refresh permission

• Mysql configuration file recovery, deleted skip-grant-tables

• Log in again, and retry flush privileges;to complete;