mysql command installation

MySQL is a free relational database management system that can run on a variety of operating systems, such as Linux, Windows, macOS, etc. In this article, we will learn how to install MySQL using command line in Linux system.

1. Download MySQL

Before starting to install MySQL, we need to download the MySQL installation package first. The official MySQL website provides a variety of installation packages, including RPM, DEB, TAR and other formats. We can choose to download the installation package that is most suitable for the Linux distribution we are using. Here, we take CentOS 7 as an example to download the installation package in RPM format.

First, use the wget command to download the MySQL installation package. Open a terminal window and enter the following command:

wget https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm

Wait for the download to complete. We can use the ls command to check whether the installation package is available in the current directory.

2. Install MySQL

After downloading the MySQL installation package, we can use the following command to install it:

sudo yum localinstall mysql80-community-release-el7-3.noarch.rpm

This command will automatically download and install MySQL dependent libraries. During the execution of the command, we will be prompted whether we need to confirm the installation. We can press the y key to confirm.

3. Detect whether MySQL is installed successfully

After the installation is completed, we can use the following command to detect whether MySQL is successfully installed:

sudo yum repolist enabled | grep "mysql.*-community.*"

If the result contains "mysql80-community" means that MySQL has been successfully installed.

4. Install MySQL Server

Next, we need to install MySQL Server. This component is the core of MySQL and is responsible for storing and managing data.

sudo yum install mysql-community-server

This command will automatically download and install MySQL Server components.

5. Start the MySQL service

After the installation is complete, we need to start the MySQL service.

sudo systemctl start mysqld

6. Set a password for MySQL

After the MySQL installation is completed, no password is set by default. In order to access and manage the MySQL server, you need to set a password. We can use the following command to set the password:

sudo grep 'temporary password' /var/log/mysqld.log | awk '{print $NF}'

After executing the above command, a temporary password will be returned, and we need to copy it.

Next, we need to log in to the MySQL server and change the password. Execute the following command:

sudo mysql -u root -p

Then enter the temporary password you just copied and press Enter. At this point we have successfully entered the MySQL server. Next, we use the following command to change the password:

ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password';

Note: Replace new_password with your new password.

After the modification is completed, enter the following command to exit the MySQL server:

quit

7. Configure the MySQL startup service

If we restart the system, the MySQL service will not be able to automatically start up. In order for the MySQL service to start automatically when the system starts, we need to configure it as a service using the following command:

sudo systemctl enable mysqld

In this way, the MySQL service will start automatically every time the system is restarted.

Summary

Through the above steps, we have successfully installed MySQL and used command line tools to complete the installation on the Linux system. Of course, in practical applications, we also need to learn and understand more basic usage and management knowledge of MySQL.

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