Directory

• Start installation
• Test for successful installation

Start installation

1. Create a mysql file installation directory

mkdir /opt/mysql

Enter this directory

cd /opt/mysql/

2. Install mysql

wget http://dev.mysql.com/get/mysql-5.7.26-1.el7.x86_64.rpm-bundle.tar

Unzip the file

tar -xvf mysql-5.7.26-1.el7.x86_64.rpm-bundle.tar

3. Delete the built-in database mariadb (if there is one on the virtual machine, no matter if it is not), it will conflict with mysql.
First execute the following command to see if it exists

rpm -qa | grep mari

If it exists, execute the following commands in sequence to delete

rpm -e --nodeps mariadb-libsrpm -e --nodeps marisa

4. Start installing mysql and execute the following commands in sequence

rpm -ivh mysql-community-common-5.7.26-1.el7.x86_64.rpmrpm -ivh mysql-community-libs-5.7.26-1.el7.x86_64.rpmrpm -ivh mysql-community-client-5.7.26-1.el7.x86_64.rpmrpm -ivh mysql-community-server-5.7.26-1.el7.x86_64.rpm

Note: When executing the last command, an error may be reported:

Solution: Execute the command to install libaio

yum install libaio

Then execute the command again

rpm -ivh mysql-community-server-5.7.26-1.el7.x86_64.rpm

5. Start mysql

systemctl start mysqld.service

6.mysql automatically sets a random password for the root user, run the command to view the current password

grep "password" /var/log/mysqld.log

7. Use the password found above to enter mysql

mysql -u root -p

8. Modify the password, and then execute the following command to make the password setting take effect (the local virtual machine can be set simpler, ECS recommends setting a complex password, and personally experience the database on the laboratory server being hacked)

set password for 'root'@'localhost'=password('root');flush privileges;

Test if the installation was successful

Exit mysql and enter with the reset password

exit

At this time, if you use Navicat to connect to the serverThe database may fail

1. ECS please enter the security group to open port 3306, the local virtual machine does not need to worry about this problem

2. If the port has been opened, the problem may be as follows:
   
   Solution:
   First enter mysql on the virtual machine, and then execute the following commands in sequence

   use mysql;
   SELECT Host, User FROM user;
   UPDATE userSET Host = '%' WHERE User = 'root';
   flush privileges;

Then reconnect with Navicat again.

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