首先安裝wget命令：

1. 下載mysql的repo源

$??wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm

2. 安裝mysql-community-release-el7-5.noarch.rpm包

$?sudo?rpm?-ivh?mysql-community-release-el7-5.noarch.rpm

安裝這個包后，會獲得兩個mysql的yum repo源：/etc/yum.repos.d/mysql-community.repo，/etc/yum.repos.d/mysql-community-source.repo。

3. 安裝mysql

$?sudo?yum?install?mysql-server

安裝成功后如圖

根據步驟安裝就可以了，不過安裝完成后，沒有密碼，需要重置密碼。

4. 重置密碼

重置密碼前，首先要登錄

$?mysql?-u?root

登錄時有可能報這樣的錯：

ERROR 2002 (HY000): Can‘t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock‘ (2)，原因是/var/lib/mysql的訪問權限問題。下面的命令把/var/lib/mysql的擁有者改為當前用戶：

然后，重啟服務：

$?service?mysqld?restart

接下來登錄重置密碼：

$?mysql?-u?root

mysql?>?use?mysql;

mysql?>?update?user?set?password=password(‘123456‘)?where?user=‘root‘;

mysql?>?exit;

5.?需要更改權限才能實現遠程連接MYSQL數據庫

可以通過以下方式來確認：

root#mysql -h localhost -uroot -p

Enter password: ******

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 4 to server version: 4.0.20a-debug

Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the buffer.

mysql> use mysql; (此DB存放MySQL的各種配置信息)

Database changed

mysql> select host,user from user; (查看用戶的權限情況)

mysql> select host, user, password from user;

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

| host????? | user | password????????????????????????????????? |

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

| localhost | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 |

| 127.0.0.1 | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 |

| localhost |????? |?????????????????????????????????????????? |

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

4 rows in set (0.01 sec)

由此可以看出，只能以localhost的主機方式訪問。

解決方法：

mysql> Grant all privileges on *.* to 'root'@'%' identified by '123456' with grant option;

(%表示是所有的外部機器，如果指定某一臺機，就將%改為相應的機器名；‘root’則是指要使用的用戶名，)

mysql> flush privileges;?? (運行此句才生效，或者重啟MySQL)

Query OK, 0 rows affected (0.03 sec)

再次查看。。

mysql> select host, user, password from user;

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

| host????? | user | password????????????????????????????????? |

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

| localhost | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 |

| 127.0.0.1 | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 |

| localhost |????? |?????????????????????????????????????????? |

| %???????? | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 |

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

4 rows in set (0.01 sec)

總結

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