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centos7安裝mysql5.6成功

vim /etc/rc.local
2 新增service mysqld start

centos7下使用yum安裝mysql

CentOS7的yum源中預設好像是沒有mysql的。為了解決這個問題,我們要先下載mysql的repo源。

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

安裝這個包後,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

根據步驟安裝就可以了,不過安裝完成後,沒有密碼,需要重置密碼。

4. 重置密碼

重置密碼前,首先要登入

$ mysql -u root

登入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的訪問許可權問題。下面的命令把/var/lib/mysql的擁有者改為當前使用者:

$ sudo chown -R openscanner:openscanner /var/lib/mysql

然後,重啟服務:

$ service mysqld restart

接下來登入重置密碼:

$ mysql -u root
mysql > use mysql;mysql > update user set password=password(‘123456‘) where user=‘root‘;mysql > exit;

5. 需要更改許可權才能實現遠端連線MYSQL資料庫

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的各種配置資訊)
Database changed
mysql> select host,user from user; (檢視使用者的許可權情況)
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’則是指要使用的使用者名稱,)
mysql> flush privileges;    (執行此句才生效,或者重啟MySQL)
Query OK, 0 rows affected (0.03 sec)
再次檢視。。
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)

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