0、環境
本文操作系統: CentOS 7.2.1511 x86_64
MySQL 版本: 5.7.13
1、下載 MySQL 官方的 Yum Repository
http://blog.static.laily.net/download-mysql-repo.png
從 MySQL 官網選取合適的 MySQL 版本，獲取下載地址。
然後使用 wget 下載：
[root@centos-linux src]# wget http://repo.mysql.com//mysql57-community-release-el7-8.noarch.rpm
--2016-07-15 13:26:51-- http://repo.mysql.com//mysql57-community-release-el7-8.noarch.rpm
正在解析主機 repo.mysql.com (repo.mysql.com)... 23.63.61.108
正在連接 repo.mysql.com (repo.mysql.com)|23.63.61.108|:80... 已連接。
已發出 HTTP 請求，正在等待迴應... 200 OK
長度：9116 (8.9K) [application/x-redhat-package-manager]
正在保存至: “mysql57-community-release-el7-8.noarch.rpm”
100%[========================================================================================>] 9,116 --.-K/s 用時 0s
2016-07-15 13:26:57 (193 MB/s) - 已保存 “mysql57-community-release-el7-8.noarch.rpm” [9116/9116])
2、安裝 yum Repository
[root@centos-linux src]# yum -y install mysql57-community-release-el7-8.noarch.rpm
已加載插件：fastestmirror
正在檢查 mysql57-community-release-el7-8.noarch.rpm: mysql57-community-release-el7-8.noarch
mysql57-community-release-el7-8.noarch.rpm 將被安裝
正在解決依賴關係
--> 正在檢查事務
---> 軟件包 mysql57-community-release.noarch.0.el7-8 將被 安裝
--> 解決依賴關係完成
依賴關係解決
==================================================================================================================================
Package 架構 版本 源 大小
==================================================================================================================================
正在安裝:
mysql57-community-release noarch el7-8 /mysql57-community-release-el7-8.noarch 8.2 k
事務概要
==================================================================================================================================
安裝 1 軟件包
總計：8.2 k
安裝大小：8.2 k
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
正在安裝 : mysql57-community-release-el7-8.noarch 1/1
驗證中 : mysql57-community-release-el7-8.noarch 1/1
已安裝:
mysql57-community-release.noarch 0:el7-8
完畢！
3、安裝 MySQL 服務端
查看 mysql server
[root@centos-linux src]# yum search mysql-com
已加載插件：fastestmirror
base | 3.6 kB 00:00:00
extras | 3.4 kB 00:00:00
mysql-connectors-community | 2.5 kB 00:00:00
mysql-tools-community | 2.5 kB 00:00:00
mysql57-community | 2.5 kB 00:00:00
updates | 3.4 kB 00:00:00
(1/3): mysql-connectors-community/x86_64/primary_db | 9.8 kB 00:00:00
(2/3): mysql-tools-community/x86_64/primary_db | 26 kB 00:00:00
(3/3): mysql57-community/x86_64/primary_db | 57 kB 00:00:00
Loading mirror speeds from cached hostfile
===================================================== N/S matched: mysql-com =====================================================
mysql-community-client.i686 : MySQL database client applications and tools
mysql-community-client.x86_64 : MySQL database client applications and tools
mysql-community-common.i686 : MySQL database common files for server and client libs
mysql-community-common.x86_64 : MySQL database common files for server and client libs
mysql-community-devel.i686 : Development header files and libraries for MySQL database client applications
mysql-community-devel.x86_64 : Development header files and libraries for MySQL database client applications
mysql-community-embedded.i686 : MySQL embedded library
mysql-community-embedded.x86_64 : MySQL embedded library
mysql-community-embedded-compat.i686 : MySQL embedded compat library
mysql-community-embedded-compat.x86_64 : MySQL embedded compat library
mysql-community-embedded-devel.i686 : Development header files and libraries for MySQL as an embeddable library
mysql-community-embedded-devel.x86_64 : Development header files and libraries for MySQL as an embeddable library
mysql-community-libs.i686 : Shared libraries for MySQL database client applications
mysql-community-libs.x86_64 : Shared libraries for MySQL database client applications
mysql-community-libs-compat.i686 : Shared compat libraries for MySQL 5.6.25 database client applications
mysql-community-libs-compat.x86_64 : Shared compat libraries for MySQL 5.6.25 database client applications
mysql-community-release.noarch : MySQL repository configuration for yum
mysql-community-server.x86_64 : A very fast and reliable SQL database server
mysql-community-test.x86_64 : Test suite for the MySQL database server
名稱和簡介匹配 only，使用“search all”試試。
安裝
[root@centos-linux src]# yum -y install mysql-community-server.x86_64
等待執行安裝完成。
4、啓動 mysql 服務
然後啓動，注意 CentOS7 的啓動方式和以前不一樣，CentOS7 使用了 systemctl
[root@centos-linux ~]# systemctl start mysqld.service
查看啓動是否成功
[root@centos-linux ~]# systemctl status mysqld.service
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: active (running) since 六 2016-07-16 11:07:56 HKT; 2min 42s ago
Process: 22051 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $MYSQLD_OPTS (code=exited, status=0/SUCCESS)
Process: 21973 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
Main PID: 22054 (mysqld)
CGroup: /system.slice/mysqld.service
└─22054 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid
7月 16 11:07:50 centos-linux.shared systemd[1]: Starting MySQL Server...
7月 16 11:07:56 centos-linux.shared systemd[1]: Started MySQL Server.
上面顯示 active (running) 則表示已經正常啓動。
5、登陸數據庫
然後就可以進入數據庫了，這裏注意一點，MySQL5.7.6 之後會在啓動 mysql 進程的時候生成一個用戶密碼，首次登陸需要這個密碼纔行。密碼保存在 mysql 進程的日誌裏，即(/var/log/mysqld.log)
查看登陸密碼
[root@centos-linux ~]# cat /var/log/mysqld.log | grep 'password'
2016-07-16T03:07:53.587995Z 1 [Note] A temporary password is generated for root@localhost: 2=s6NZk.t:fz
然後登陸
[root@centos-linux ~]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.13
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
到這裏 MySQL 就完全安裝完成了。
6、修改 root 密碼
但是如果想正常使用還需要修改密碼
mysql> show databases;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
以前的 password()函數將會被拋棄，官方建議使用下面的命令來修改密碼
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password';
同時，如果你設置的密碼過於簡單也會報錯。
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123';
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
具體關於設置密碼的規則，可以看這一篇文章。
這裏我們注意設置密碼 長度要大於8，同時要有數字，大小寫，特殊字符。
最後，安裝完了可以刪除 MySQL 的 Repository ，這樣可以減少 yum 檢查更新的時間，使用下面的命令。
[root@typecodes ~]# yum -y remove mysql57-community-release-el7-8.noarch
7 .添加遠程登錄用戶
mysql> GRANT ALL PRIVILEGES ON *.* TO 'root(用戶名)'@'%' IDENTIFIED BY 'root（密碼）' WITH GRANT OPTION;
mysql> flush privileges; // 使其生效
mysql> use mysql;
mysql> select host, name from user; // 查看是否添加成功