以下實踐操作是在 liux-centos7 上安裝配置

1、官網下載包

https://dev.mysql.com/downloads/repo/yum/

2、安裝yum mysql 倉庫

[root@localhost ~]# yum install -y https://repo.mysql.com//mysql57-community-release-el7-11.noarch.rpm

#查看yum mysql倉庫
[root@www ~]# ls /etc/yum.repos.d/ 

2.1、如果想使用本地rpm文件，則修改文件 mysql.community.repo文件

[root@localhost ~]# cat /etc/yum.repos.d/

　[root@localhost ~]# vim /etc/yum.repos.d/mysql-community.repo

[mysql-connectors-community]
name=MySQL Connectors Community
baseurl=http://repo.mysql.com/yum/mysql-connectors-community/el/7/$basearch/ #這裏配置成本地文件路徑
enabled=1   #1 開啟 0關閉
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql # 設置成0不用檢查

[mysql-tools-community]
name
 
=MySQL Tools Community
baseurl=http://repo.mysql.com/yum/mysql-tools-community/el/7/$basearch/ #這裏配置成本地文件路徑
enabled=1 # 1-開啟 0-關閉
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql # 設置成0不用檢查

3、查看過濾mysql包

[root@localhost ~]# yum list | grep "mysql-community"

mysql-community-server.x86_64 5.7.19-1.el7 mysql57-community
mysql
 
-community-client.x86_64 5.7.19-1.el7 mysql57-community

4、安裝服務端和客戶端

[root@localhost ~]# yum install mysql-community-client mysql-community-server -y
或
 yum install mysql-community-server 

5、啟動mysql服務

[root@localhost ~]# systemctl start mysqld

6、登錄mysql

#查看密碼
[root@localhost ~]# grep ‘temporary password‘ /var/log/mysqld.log
[root@localhost ~]# mysql -uroot -p
Enter password:

7、關閉密碼策略以及修改密碼 ；詳細參考：https://www.cnblogs.com/zhi-leaf/p/5994478.html

[root@localhost ~]# set global validate_password_policy=0;
[root@localhost ~]# set global validate_password_length=1;

[root@localhost ~]# ALTER USER ‘root‘@‘localhost‘ IDENTIFIED BY ‘123456‘;

8、重啟服務並登錄

[root@localhost ~]# systemctl restart mysqld

[root@localhost ~]# mysql -uroot -p

 Enter password:123456

9、授權遠程登錄並刷新權限

GRANT ALL PRIVILEGES ON *.* TO ‘root‘@‘%‘ IDENTIFIED BY ‘your_root_password‘ WITH GRANT OPTION;  
FLUSH PRIVILEGES; 

10、默認配置文件路徑：

配置文件：/etc/my.cnf 
日誌文件：/var/log//var/log/mysqld.log 
服務啟動腳本：/usr/lib/systemd/system/mysqld.service 
socket文件：/var/run/mysqld/mysqld.pid

　#(a)數據庫目錄
　 /var/lib/mysql/

　#(b)配置文件
　　/usr/share /mysql（mysql.server命令及配置文件）

　#(c)相關命令
　　/usr/bin（mysqladmin mysqldump等命令）

　#(d)啟動腳本
　　/etc/rc.d/init.d/（啟動腳本文件mysql的目錄）

如果忘記root密碼，則按如下操作恢復

#在[mysqld]的段中加上一句：skip-grant-tables 保存並且退出vi。

mysql  -u root

update mysql.user set authentication_string=password(‘123qwe‘) where user=‘root‘ and Host = ‘localhost‘;

flush privileges

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MySQL（二）yum源與rpm包方式安裝