Centos7 install mysql5.7

1. Go to the mysql official website to get the download link of mysql

   https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

 

2. Download the mysql rpm package

wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

 

3.rpm installation

rpm -ivh mysql57-community-release-el7-11.noarch.rpm

 

4. After the rpm installation is complete, yum installation

yum install mysql57-community-release-el7-11.noarch.rpm

 

5. View the initial password after the installation is complete

grep temporary password /var/log/mysqld.log

 

6. Test login

mysql -uroot -p

 

7. If you can't do anything after logging in or log in with a 1045 error code, try to change the password and log in again

   $ sudo systemctl stop mysqld.service

     $ sudo systemctl set-environment MYSQLD_OPTS="--user=mysql --skip-grant-tables --skip-networking"

     $ sudo systemctl start mysqld.service    

     $ mysql -u root mysql

 

     mysql > UPDATE mysql.user SET authentication_string=PASSWORD("abcdef")  WHERE user='root' and host='localhost';

     mysql > flush privileges;

     mysql > quit

 

     $ sudo systemctl unset-environment MYSQLD_OPTS

     $ sudo systemctl restart mysqld.service

 

 mysql open remote connection

1. Log in to the database

mysql -uroot -p

 

 2. Open the remote connection

    root username
    % everyone can access
    password password

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;
mysql> FLUSH PRIVILEGES;

 

 3. Restart mysql

service mysqld restart

 

 If you still cannot connect to mysql remotely after performing the above steps, try to open port 3306 of the firewall or close the firewall