Detailed tutorial on installing MySQL8 in Centos7 environment

1. Xftp7 download

I will not demonstrate the downloading of Xftp7. After downloading, it will look like this:

We need to use Xftp7 to upload the MySQL8 installation package to the server.

2. Download the MySQL8 installation package

There are two ways to install the MySQL8 installation package:

Official website : https://dev.mysql.com/downloads/mysql
Site C : https://download.csdn.net/download/zp8126/20694042

After the download is successful, it will look like this:

3. Upload the MySQL8 installation package to the server

We need to use it Xftp7to upload the MySQL8 installation package to the server.

First open Xshell:

Then upload the MySQL8 installation package we downloaded to the server, and then wait for the transfer to complete:

This is considered a successful transfer.

Here we installed the MySQL8 installation package into the opt directory, and then created a new mysql8.0.26 folder in the opt directory, that is, moved the MySQL8 installation package to the mysql8.0.26 folder. Please see:

4. Unzip the mysql8 installation package

Since we moved the mysql8 installation package to the mysql8.0.26 folder, we first enter the mysql8.0.26 folder and then unzip it in this directory.

Enter the command to decompress :tar -xvf mysql-8.0.26-1.el7.x86_64.rpm-bundle.tar

The decompression results are as follows:

5. Installation of rpm package

First go to this address to download: https://developer.aliyun.com/packageSearch?word=telnet
That is:

The download process will not be demonstrated here.

6. Install the following files in order

Put important things first :

• Note that the installed file name must be consistent with the file name extracted above.
• Be careful to choose forced installation
• Install the following commands in order:

Command 1: rpm -ivh mysql-community-common-8.0.26-1.el7.x86_64.rpm

Command 2: rpm -ivh mysql-community-libs-8.0.26-1.el7.x86_64.rpm --nodeps --force

Command 3: rpm -ivh mysql-community-client-8.0.26-1.el7.x86_64.rpm --nodeps --force

Command 4:rpm -ivh mysql-community-server-8.0.26-1.el7.x86_64.rpm --nodeps --force

Okay, after following the above 4 commands, we check whether the following is successful and
enter the command:rpm -qa | grep mysql

7. Initialize and authorize MySQL

Enter command 1:mysqld --initialize;
After entering command 1, if the following error is displayed, you need to enter the command: yum install -y libaio


Then execute command 1 again, please see:

Enter command 2:chown mysql:mysql /var/lib/mysql -R;

8. View the database initial password

input the command:cat /var/log/mysqld.log | grep password

9. Start the MySQL service

Enter command 1:systemctl start mysqld.service;

Enter command 2:systemctl enable mysqld;

10. Log in to MySQL using the initial password

Enter the command: mysql -u root -p, then enter your password to log in!

Now we enter the command: show databases;Check which databases there are:

an error will be reported at this time, because we have not reset the password.

Enter the command to reset the password : ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '新密码';

the modification is successful here.

At this point we are executing the command to see which databases are currently available:show database;

At this point, the installation of MySQL8 is officially completed.

About uninstalling MySQL

• Stop the MySQL service:systemctl stop mysqld
• Query the MySQL installation file:rmp -qa | grep -i mysql
• Uninstall all MySQL installation packages queried above: rpm -e --nodeps mysql-x.x.x.x
• Delete the MySQL data storage directory:rm -rf /var/lib/mysql/
• Delete MySQL configuration file backup:rm -rf /etc/my.cnf.rpmsave