Binary deployment is relatively simple, so you can go to MySQL official website to download the MySQL binary package without installing the dependent environment. Or download through the link of my network disk, which contains the script for automatic deployment.

Note: the latest MySQL version 8.0 is completely consistent with the deployment process of this version 5.7, except that the binary package files used are different.

1. Uninstall mariadb

[root@mysql01 ~]# yum -y erase mariadb
[root@mysql01 ~]# rpm -e qt-mysql-4.8.7-2.el7.x86_64 --nodeps 

2. Deploy mysql 5.7

[root@mysql01 src]# tar zxf mysql-5.7.28-linux-glibc2.12-x86_64.tar.gz 
[root@mysql01 src]# mv mysql-5.7.28-linux-glibc2.12-x86_64 /usr/local/mysql
[root@mysql01 src]#  ln -sf /usr/local/mysql/bin/* /usr/local/bin/

3. Edit the configuration file and initialize MySQL

[root@mysql01 src]# rm -rf /etc/my.cnf
[root@mysql01 src]# vim /etc/my.cnf      #Edit MySQL main profile
[mysqld]
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
pid-file=/usr/local/mysql/data/mysqld.pid
log-error=/usr/local/mysql/data/mysql.err
socket=/tmp/mysql.sock
[client]
socket=/tmp/mysql.sock#Create the required directory and users and change the owner
[root@mysql01 src]#  mkdir /usr/local/mysql/data
[root@mysql01 src]# useradd -M -s /sbin/nologin mysql
[root@mysql01 src]# chown -R mysql.mysql /usr/local/mysql/#Initialize MySQL
[root@mysql01 src]# mysqld --initialize --user mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data#Add as system service
[root@mysql01 src]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
[root@mysql01 src]# chkconfig --add mysqld#Start and set to start automatically
[root@mysql01 src]# systemctl enable mysqld
[root@mysql01 src]# systemctl start mysqld#Make sure port 3306 is listening
[root@mysql01 src]# netstat -anpt | grep 3306
tcp6       0      0 :::3306                 :::*                    LISTEN      2589/mysqld         

4. Modify the initial password of MySQL root

#Get the initial password of root
[root@mysql01 src]# mysqlpwd=`cat /usr/local/mysql/data/mysql.err | grep password |awk -F'root@localhost: ' '{print $2}'`#Reset password to 123.com
[root@mysql01 src]# mysql -uroot -p${mysqlpwd} -e 'alter user root@localhost identified by "123.com"' --connect-expired-password#Login test with new password
[root@mysql01 src]# mysql -uroot -p123.com#Additional: help command in MySQL
mysql> help show;          #This command can check the syntax of all show commands and help + any command word