1.输入命令查询系统中已安装的mysql

2. . 逐个卸载mysql 　yum remove 系统显示已安装的mysql 　比如：yum remove MySQL-client-5.6.33-1.linux_glibc2.5.x86_64

** 3. 卸载完成后使用find命令来查找系统中存在的mysql文件夹**

4.使用rm -rf命令逐个删除文件夹路径即可 比如：rm -rf /etc/rc.d/init.d/mysql

5.安装MySQL rpm -ivh MySQL-client-5.6.33-1.linux_glibc2.5.x86_64.rpm rpm -ivh MySQL-server-5.6.33-1.linux_glibc2.5.x86_64.rpm

6. 修改配置文件 cp /usr/share/mysql/my-default.cnf /etc/my.cnf

7. 初始化MySQL及设置密码 /usr/bin/mysql_install_db service mysql start cat /root/.mysql_secret #查看root账号密码 mysql -u root –pqKTaFZnl mysql> SET PASSWORD = PASSWORD('123456'); #设置密码为123456 mysql> exit

8. 设置远程访问 mysql> use mysql; Database changed mysql> grant all privileges on . to root@'%' identified by "password"; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec)

	mysql> select host,user,password from user;
	+--------------+------+-------------------------------------------+
	| host         | user | password                                  |
	+--------------+------+-------------------------------------------+
	| localhost    | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E |
	| 192.168.1.1 | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E |
	| %            | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E |
	+--------------+------+-------------------------------------------+
	3 rows in set (0.00 sec)

9. 设置开机自启动 加入到系统服务： chkconfig --add mysql 自动启动： chkconfig mysql on 查询列表： chkconfig