接上文,開始安裝mysql5.6。

1. 通過yum線上安裝mysql
   1. 如果沒有安裝yum-utils包,執行命令

   yum -y install yum-utils 
   

   2. 檢測系統是否自帶安裝mysql

   yum list installed | grep mysql
   

   3. 刪除系統自帶的mysql及其依賴

   yum -y remove mysql-libs.x86_64
   

   4. 給CentOS新增rpm源，並且選擇較新的源

   # wget dev.mysql.com/get/mysql-community-release-el6-5.noarch.rpm
   # yum localinstall mysql-community-release-el6-5.noarch.rpm
   檢視mysql安裝源
   # yum repolist all | grep mysql
   禁用低版本安裝源
   # yum-config-manager --disable mysql55-community
   開啟高版本安裝源
   # yum-config-manager --enable mysql56-community
   # yum-config-manager --enable mysql57-community-dmr
   檢視已開啟版本安裝源
   # yum repolist enabled | grep mysql
    
   

   5. 安裝mysql伺服器

   yum install mysql-community-server
   

   6. 啟動mysql

   service mysqld start
   

   7. 登入mysql

   	mysql -uroot -p 
   	不需要輸入密碼
   	SET PASSWORD = PASSWORD('ieforever');
   

2. 設定遠端訪問：

       1.建立使用者
       create user 'crbchqimis'@'%' identified by 'crbchqimis';
       2.賦予許可權
       grant all privileges on *.* to 'crbchqimis' @'%' identified by 'crbchqimis'; 
       grant all privileges on *.* to 'crbchqimis' @'localhost' identified by 'crbchqimis'; 
       3.重新整理許可權
       flush privileges;
    
   

3. 檢視使用者

   use mysql;
   SELECT DISTINCT CONCAT('User: [', user, '''@''', host, '];') AS USER_HOST FROM user;
   +------------------------------------+
   | USER_HOST                          |
   +------------------------------------+
   | User: [ieforever'@'%];             |
   | User: [mysql.session'@'localhost]; |
   | User: [mysql.sys'@'localhost];     |
   | User: [root'@'localhost];          |
   +------------------------------------+
    
   

4. 設定編碼和不區分大小寫

   vim /etc/my.cnf
   在[mysqld] 下新增
   lower_case_table_names=1
   character_set_server=utf8
   重啟服務
   service mysqld restart
   

   以上mysql5.6已經安裝成功，下面開啟訪問埠：
   1. 檢視已開放的埠(預設不開放任何埠) firewall-cmd --list-ports
   2. 開啟3306埠 firewall-cmd --zone=public(作用域) --add-port=3306/tcp(埠和訪問型別) --permanent(永久生效)
   3. 重啟防火牆 firewall-cmd --reload