參考：http://dev.MySQL.com/doc/mysql-yum-repo-quick-guide/en/
1.增加yum數據源
（1.1）從http://dev.mysql.com/downloads/repo/yum/ 獲取合適的數據源
（1.2）安裝數據源包
shell> sudo rpm -Uvh platform-and-version-specific-package-name.rpmeg：安裝 Red Hat EnterPRise linux 7 / Oracle Linux 7 (Architecture Independent), RPM Package
shell> wget http://repo.mysql.com/mysql57-community-release-el7-7.noarch.rpmshell> sudo rpm-Uvh mysql57-community-release-el7-7.noarch.rpm
2.選擇合適的安裝版本
（2.1）查看mysql數據源中存在的包
shell> sudo yum repolist all | grep mysql
（2.2）編輯 /etc/yum.repos.d/mysql-community.repo，啟用相應的mysql版本
# Enable to use MySQL 5.6[mysql56-community]name=MySQL 5.6 Community Serverbaseurl=http://repo.mysql.com/yum/mysql-5.6-community/el/7/$basearch/enabled=0gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql[mysql57-community]name=MySQL 5.7 Community Serverbaseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/7/$basearch/enabled=1gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
ps: "enabled=1" 啟用，"enabled=0" 禁用，上述配置則是安裝"mysql 5.7"，禁用"mysql 5.6"
（2.3）查看mysql啟用列表
shell > sudo yum repolist enabled | grep mysqlmysql-connectors-community/x86_64 MySQL Connectors Community 17mysql-tools-community/x86_64 MySQL Tools Community 27mysql57-community/x86_64 MySQL 5.7 Community Server 20
3.安裝mysql
shell> sudo yum install mysql-community-server
注意：在使用yum 安裝 mysql 5.7過程中，會隨機生成一個臨時的root密碼保存到錯誤日志（"/var/log/mysqld.log")，可以使用如下命令進行查看：
shell > sudo grep 'temporary passWord' /var/log/mysqld.log
因此安裝mysql 5.7后，需要盡快修改密碼。
4.啟動mysql服務器
shell> yum --disablerepo=/* --enablerepo='mysql*-community*' list available
（4.1）啟動命令
shell> sudo service mysqld start（4.2）查看mysql狀態
shell> sudo service mysqld status5.mysql_secure_installation
使用mysql_secure_installation設置root密碼，刪除匿名用戶等重要操作
shell> mysql_secure_installation
ps: 更多操作參考
http://dev.mysql.com/doc/refman/5.7/en/mysql-secure-installation.html
http://dev.mysql.com/doc/refman/5.7/en/default-privileges.html
6.安裝mysql額外工具
（6.1）查看可用包名
shell> mysql_secure_installation
（6.2）安裝包
shell> sudo yum install 包名
如：安裝 mysql-workbench-community
shell> sudo yum install mysql-workbench-community
7.升級mysql
（7.1）編輯 /etc/yum.repos.d/mysql-community.repo
（7.2）執行update
shell> sudo yum update mysql-server
或者使用下述命令更新所有包
shell> sudo yum update
8. centos7默認使用mariadb數據庫代替mysql，先將mariadb相關包卸載
（8.1）查詢 maridb 包命令
shell> sudo rpm -qa | grep -i mariadb
（8.2）刪除
shell> sudo rpm -e 相關包名新聞熱點
疑難解答
