1.官网下载地址

2.检测本地是否有mysql已存在的包rpm -qa | grep mysql

3.检测本地是否有mariadb已存在的包rpm -qa | grep mariadb

4.如果存在，则使用yum命令卸载

mariadb-libs-5.5.56-2.el7.x86_64yum -y remove mariadb-libs-5.5.56-2.el7.x86_64

5.创建一个文件夹，上传jar包到/opt/software/mysqlmkdir /opt/software/mysql

6.解压mysql jar包tar -xvf mysql-5.7.19-1.el7.x86_64.rpm-bundle.tar

7.安装mysql的 server、client、common、libs、lib-compatrpm -ivh --nodepsmysql-community-server-5.7.19-1.el7.x86_64.rpm

rpm -ivh --nodepsmysql-community-client-5.7.19-1.el7.x86_64.rpm

rpm -ivh mysql-community-common-5.7.19-1.el7.x86_64.rpm

rpm -ivh mysql-community-libs-5.7.19-1.el7.x86_64.rpm

rpm -ivhmysql-community-libs-compat-5.7.19-1.el7.x86_64.rpm

8.查看mysql的服务是否启动systemctl status mysqld

Active: inactive (dead)

9.启动mysql的服务systemctl start mysqld

10.再次检查mysql的服务是否启动systemctl status mysqld

Active: active (running)since Thu 2019-03-21 07:23:08 EDT; 2s ago

11.查看默认生成的密码cat /var/log/mysqld.log | grep password

2019-03-21T11:23:01.643479Z 1 [Note] A temporary password is generatedfor root@localhost:cO3e&shrqhFt

12.登录mysql服务mysql -uroot -p   然后粘贴上密码

13.修改mysql密码规则

0 or LOW长度

1 or MEDIUM长度、大小写、数字、特殊字符

2 or STRONG长度、大小写、数字、特殊字符、词典

[if !supportLists]a.[endif]密码强度检查等级，0/LOW、1/MEDIUM、2/STRONG

注：以下修改是临时修改mysql>set global validate_password_policy=0;

Query OK, 0 rows affected (0.05 sec)

b.密码至少要包含的小写字母个数和大写字母个数mysql>set global validate_password_mixed_case_count=0;

Query OK, 0 rows affected (0.00 sec)

c.密码至少要包含的数字个数mysql> set global validate_password_number_count=3;

Query OK, 0 rows affected (0.00 sec)

d.密码至少要包含的特殊字符数mysql>set global validate_password_special_char_count=0;

Query OK, 0 rows affected (0.00 sec)

e.密码最小长度，参数默认为8，

它有最小值的限制，最小值为：validate_password_number_count

+ 密码至少要包含的数字个数validate_password_special_char_count

+特殊字符

(2 *validate_password_mixed_case_count)至少要包含的小写字母个数和大写字母个数mysql> set global validate_password_length=3;

Query OK, 0 rows affected (0.00 sec)mysql> use mysql;mysql> SHOW VARIABLES LIKE 'validate_password%';

+--------------------------------------+-------+

| Variable_name                       | Value |

+--------------------------------------+-------+

| validate_password_dictionary_file   |       |

| validate_password_length            | 3     |

| validate_password_mixed_case_count  | 0     |

| validate_password_number_count      | 3     |

| validate_password_policy            | LOW   |

| validate_password_special_char_count | 0     |

+--------------------------------------+-------+

14.修改密码：'000000'为新密码SET PASSWORD FOR 'root'@'localhost' = PASSWORD('000000');

15.修改远程登录权限

如上图所示：这个是可以成功远程链接得配置

大家默认的%的位置是localhost,即意味着只能本机访问

查询当前user表内root的登录权限：selecthost,user from mysql.user;

修改权限为所有%：update mysql.user set host = '%' where user ='root';

刷新缓存：flush privileges;