CentOS YUM安装MYSQL5.6

1.首先查看系统自带的mysql版本

[hadoop@mini03 ~]$ rpm -qa | grep mysql
mysql-libs-5.1.71-1.el6.x86_64
[hadoop@mini03 ~]$

2.卸载mysql-libs-5.1.71-1.el6.x86_64

[hadoop@mini03 ~]$ sudo rpm -e --nodeps mysql-libs-5.1.71-1.el6.x86_64
[hadoop@mini03 ~]$

3.安装wget

[hadoop@mini03 ~]$ sudo yum install -y wget

4.随便在你存放文件的目录下执行下面的命令
这里解释一下，由于这个mysql的yum源服务器在国外，所以下载速度会比较慢可以配置阿里的yun源
https://blog.csdn.net/huoliangwu/article/details/84553855

[hadoop@mini03 ~]$ sudo wget http://repo.mysql.com/mysql-community-release-el6-5.noarch.rpm

5.接着执行这句,解释一下，这个rpm还不是mysql的安装文件，只是两个yum源文件，执行后，在/etc/yum.repos.d/ 这个目录下多出mysql-community-source.repo和mysql-community.repo

[hadoop@mini03 ~]$ sudo rpm -ivh mysql-community-release-el6-5.noarch.rpm

6.这个时候，可以用yum repolist mysql这个命令查看一下是否已经有mysql可安装文件

[hadoop@mini03 ~]$ sudo yum repolist all | grep mysql
mysql-connectors-community        MySQL Connectors Community      enabled:    66
mysql-connectors-community-source MySQL Connectors Community - So disabled
mysql-tools-community             MySQL Tools Community           enabled:    68
mysql-tools-community-source      MySQL Tools Community - Source  disabled
mysql55-community                 MySQL 5.5 Community Server      disabled
mysql55-community-source          MySQL 5.5 Community Server - So disabled
mysql56-community                 MySQL 5.6 Community Server      enabled:   474
mysql56-community-source          MySQL 5.6 Community Server - So disabled
mysql57-community-dmr             MySQL 5.7 Community Server Deve disabled
mysql57-community-dmr-source      MySQL 5.7 Community Server Deve disabled
[hadoop@mini03 ~]$

可以看到已经有5.6和5.7的mysql按照包可以安装了

7.安装mysql 服务器命令（一路yes）：

[hadoop@mini03 ~]$ sudo yum install mysql-community-server

8.启动服务

[hadoop@mini03 ~]$ sudo service mysqld start

9.由于mysql刚刚安装完的时候，mysql的root用户的密码默认是空的，所以我们需要及时用mysql的root用户登录（第一次回车键，不用输入密码），并修改密码

[hadoop@mini03 ~]$ mysql -u root 


mysql> use mysql;
mysql> update user set password=PASSWORD("这里输入root用户密码") where User='root';
mysql> flush privileges; 
Query OK, 0 rows affected (0.15 sec)

CentOS YUM安装MYSQL5.6

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