Install MySQL database

How to install MySQL database

One 、 install YUM Repo

1、 because CentOS Of yum There is no mysql, Need to mysql Download on yum repo The configuration file .

Download command ：

wget https://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm

2、 Then proceed repo Installation ：

rpm -ivh mysql57-community-release-el7-9.noarch.rpm

After the execution is completed, it will be in /etc/yum.repos.d/ Two repo file mysql-community.repo mysql-community-source.repo

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Two 、 Use yum Command to complete the installation

Be careful ： Must enter into /etc/yum.repos.d/ Then execute the following script

1、 Installation command ：

yum install mysql-server

2、 start-up msyql：

systemctl start mysqld # start-up MySQL

3、 Get temporary password for installation （ This is the password you use when you log in for the first time ）：

grep ‘temporary password’ /var/log/mysqld.log

4、 If you don't get a temporary password , be

4.1、 Remove the previously installed mysql Residual data

rm -rf /var/lib/mysql

4.2. Restart mysql

systemctl start mysqld # start-up MySQL

• Forget the password ：
  open mysql5.7 Configuration file for my.cnf, And add a line to it ：skip-grant-tables Save and exit (:wq)
  restart
• use root To login ： [[email protected] ~]# mysql -u root
  Use mysql Medium mysql database ： mysql> use mysql;
  Change Password : update user set authentication_string = password(“Szfore_68638”) where user=“root” ;
  Refresh database ： flush privileges;
  sign out ： quit;