Linux_Mysql 5.7.19安装配置

MySQL安装配置

1. 官网下载地址

https://dev.mysql.com/downloads/file/?id=471503

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_64
yum -y remove mariadb-libs-5.5.56-2.el7.x86_64
rpm -e —nodeps mariadb-libs-5.5.56-2.el7.x86_64

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

6.解压mysql jar包
tar -xvf mysql-5.7.19-1.el7.x86_64.rpm-bundle.tar -C /opt/module/mysql

7.安装mysql的 server、client、common、libs、lib-compat
rpm -ivh —nodeps mysql-community-server-5.7.19-1.el7.x86_64.rpm
rpm -ivh —nodeps mysql-community-client-5.7.19-1.el7.x86_64.rpm
rpm -ivh —nodeps mysql-community-common-5.7.19-1.el7.x86_64.rpm
rpm -ivh —nodeps mysql-community-libs-5.7.19-1.el7.x86_64.rpm
rpm -ivh —nodeps mysql-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 generated for root@localhost: iwkJGgd:j6jO

12.登录mysql服务
mysql -uroot -p’然后粘贴上密码’

13.修改mysql密码规则

注：以下修改是临时修改

1. 密码强度检查等级，0/LOW、1/MEDIUM、2/STRONG

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)

1. 修改密码：

alter user root@localhost identified by ‘000000’;
flush privileges;
(这两步可以跳过)
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 |
+———————————————————+———-+

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：
select host,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;