10 minutes to master the installation steps of MySQL

mysql As a database commonly used in daily development , It's very important for every programmer , Come with me today mysql Your installation journey .

One 、 install

1、 How to install the package

1.1、 Get installation package

Yes mysql For people who have been in contact , We all know mysql It is divided into commercial version and community version , Because it's just for development 、 The use of learning , Select the community version here to install . First open the official website .

https://www.mysql.com/

mysql Download from the official website

Go to the download page , Slide to the bottom to see the download link of the community version , Here's the picture ,

mysql Download address

Jump to the download page of the Community Edition

mysql The download page

You can see that there are many ways to install , Here, first select the installation package of binary files , Go to the corresponding page , Select the required version to download , The environment I want to install here is centos7, So the following version is selected here ,

When the download is complete , Use rz The command is uploaded to linux On the machine ,rz The order is linux Command below , If you don't have this command, you can install Baidu by yourself .

1.2、 Use the installation package to install （ Failed to install ）

In the above steps, the installation package has been successfully uploaded to linux On the machine , Pictured above , The next step is to decompress , Use the following command ,

tar -xvf mysql-8.0.26-1.el8.x86_64.rpm-bundle.tar 

After decompression , You can see these files

mysql The extracted file

Just install it , Here is rpm package , So use rpm Command to install

mysql install

Show the following ,

mysql Error during installation

Indicates a missing dependency , For example, lack of GLIBC_2.28、OPENSSL_1_1_0 etc. , I haven't successfully installed it here , So it doesn't continue here , A friend who knows something can give me a suggestion . Next, install in another way .

2、yum The way

2.1、 Get the installation file

stay mysql Your download page is mysql Of yum file ,

download mysql Of yum file

Download this file to your local ,

Download local yum file

Upload the file to linux On the machine , As mentioned earlier, you can use rz command , I have passed it here ,

Upload to linux Of yum file

Let's install

2.2、 install

2.2.1、 add to mysql Of rpm To yum Source

Because of the yum Installation method of , So put the above yum Add files to yum In the source ,

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

Check yum In source mysql

yum  repolist all | grep mysql 

You can see that the newly added status is enabled , Pictured above , in addition , If there are other versions whose status is enabled , Be sure to shut it down , Use the following command

yum-config-manager --disable MySQL Cluster 7.5 Community

2.2.2、 Delete previous version

If you've installed it before mysql, You can use the following command to view

yum list installed | grep mysql

I've installed... Here , So there are the following dependencies

You can use the following command to delete

yum -y remove mysql-community-client.x86_64

2.2.3、 install

Use the following installation command to install ,

yum install mysql-community-server

Here's the picture

mysql setup script

Just install it .

After installation, check whether the installation is successful .

The figure above shows that the installation has been successful .

Two 、 To configure

Just installed mysql Can only be accessed locally , Lack of remote access , So here we need to configure , Because of the use of yum Install by default , that mysql Where was it installed? That

2.1、mysql Installation position of

Use the following command

which mysqld

The results are as follows

After installation mysql The location of

You can see that it is installed in /usr/sbin Under the table of contents ,

that mysql Where is your configuration file ,

/usr/sbin/mysqld --verbose --help |grep -A 1 'Default options'     

Here's the picture ,

As can be seen from the above, first read /etc/my.cnf, And then there was etc/mysql/my.cn And then there was /usr/etc/my.cnf Continue reading in this order , That is to say, only one directory exists in the above paths my.cnf that will do . Let's look at /etc/ Whether there is

my.cnf The location of

The file exists , Edit the file

The document is as follows ,

my.inf The contents of the document

You can see mysql Data directory for 、pid Other configuration . remember log-error=/var/log/mysqld.log This configuration . All right, let's start

2.2、 start-up mysql

Use the following command to start mysql

service mysqld start

mysql Start state of

You can see that it has been started successfully . Now log in

2.3、 Log in locally

Now the service has started ,mysql It comes with a local client , You can use the client mode to start , So what's our account and password? That , Don't worry , Above we remember log-error=/var/log/mysqld.log This is also a configuration , This is a mysql Start log , Look at this file

mysql Your default account number

Find the key sentence from the above , That is to say mysql When starting, it will give root A temporary password , I am here 0Q*_k1F.KFo9, Use this password to log in ,

mysql -hlocalhost -uroot -p

Log in with the default account mysql

You can see that you have successfully logged in , Just mentioned that root Your password is temporary , Then you need to change the password now .

2.4、 modify root The temporary password for

You have just logged in successfully , But because you use a temporary password , So I can't do anything , You must change the temporary password ,

mysql> alter user [email protected] identified by '123!QAZ';

Change your password here . That's it root Password modification . Use exit After the command exits , Just log in with a new password .

2.5、 Add remote login account

mysql> create user 'root'@'%' identified by 'root';// Refresh the permissions mysql> flush privileges;

Added root Your remote login account ;

In this way, you can use root Remote login .

2.6、 Use navicat Remote login

Use navicat Connect mysql, here mysql The version is 8, The following error occurred while connecting

Log in locally using the command line , Execute the following command

mysql> use mysql;mysql> alter user 'root'@'%' identified with mysql_native_password by '123!QAZ';mysql> flush privileges;

Then log in as follows ,

2.7、 to grant authorization

You can see from the above picture that root The permission of the account is obviously not the maximum , It needs to be authorized ,

mysql> grant all privileges on *.* to 'root'@'%'  WITH GRANT OPTION;mysql> flush privileges;

3、 ... and 、 summary

This article records mysql Installation steps of , And threw out some problems and solutions , The problems left in this paper , I hope you can come up with a solution , Thank you for your .