1、解除安裝系統自帶的 mariadb-lib

    1）#rpm -qa|grep mariadb

    2）# rpm -e mariadb-libs-5.5.60-1.el7_5.x86_64 --nodeps

    3）#rpm -qa|grep mariadb

2、安裝 wget

    #yum install wget -y

3、下載mysql5.7.16 rpm安裝包，官網最新的mysql安裝包是mysql-5.7.16-1.el7.x86_64.rpm-bundle.tar下載地址

    #wget http://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.16-1.el7.x86_64.rpm-bundle.tar

4、解壓

    #tar -xvf mysql-5.7.16-1.el7.x86_64.rpm-bundle.tar

5、依次安裝：

    1）#rpm -ivh mysql-community-common-5.7.16-1.el7.x86_64.rpm

    2）#rpm -ivh mysql-community-libs-5.7.16-1.el7.x86_64.rpm

    3）#rpm -ivh mysql-community-client-5.7.16-1.el7.x86_64.rpm

    4）#rpm -ivh mysql-community-server-5.7.16-1.el7.x86_64.rpm

    第4）步的時候可能會報錯：

        warning: mysql-community-server-5.7.16-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY

        error: Failed dependencies:

        libaio.so.1()(64bit) is needed by mysql-community-server-5.7.16-1.el7.x86_64

        ibaio.so.1(LIBAIO_0.1)(64bit) is needed by mysql-community-server-5.7.16-1.el7.x86_64

        libaio.so.1(LIBAIO_0.4)(64bit) is needed by mysql-community-server-5.7.16-1.el7.x86_64

        net-tools is needed by mysql-community-server-5.7.16-1.el7.x86_64（可能沒有這個）

    需要安裝：

       1）libaio-0.3.107-10.el6.x86_64.rpm

               1）#wget http://mirror.centos.org/centos/6/os/x86_64/Packages/libaio-0.3.107-10.el6.x86_64.rpm

               2）#rpm -ivh libaio-0.3.107-10.el6.x86_64.rpm

       2）yum install net-tools -y

   5）繼續安裝(如果第4）步沒有錯，就不用)

         #rpm -ivh mysql-community-server-5.7.16-1.el7.x86_64.rpm

6、資料庫初始化

    1）#mysqld --initialize --user=mysql

    2）找密碼，紅色區域

        1）# cat /var/log/mysqld.log 

              [Note] A temporary password is generated for [email protected]: )1r3gi,hjgQa

7、現在啟動mysql資料庫

    1）#systemctl start mysqld.service

    2）# mysql -uroot -p

8、修改密碼、許可權

    1）#ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password';

    2）#GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION;

    3）#flush privileges;

9、開放埠

    1）#firewall-cmd --zone=public --add-port=3306/tcp --permanent

    2）#firewall-cmd --reload

10、完成

附：

啟動/停止/重啟MySQL

    1）啟動：service mysqld start

    2）停止：service mysqld stop

    3）重啟：service mysqld restart