centos7使用yum安装mysql数据库
centos7下使用yum安装mysql
CentOS7的yum源中默认好像是没有mysql的。为了解决这个问题,我们要先下载mysql的repo源。
1. 下载mysql的repo源
wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
2. 安装mysql-community-release-el7-5.noarch.rpm包
sudo rpm -ivh mysql-community-release-el7-5.noarch.rpm
安装这个包后,会获得两个mysql的yum repo源:/etc/yum.repos.d/mysql-community.repo,/etc/yum.repos.d/mysql-community-source.repo。
3. 安装mysql
sudo yum install mysql-server
根据步骤安装就可以了,不过安装完成后,没有密码,需要重置密码。
4. 重置密码
重置密码前,首先要登录
mysql -u root -p
登录时有可能报这样的错:ERROR 2002 (HY000): Can‘t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock‘ (2),原因是/var/lib/mysql的访问权限问题。下面的命令把/var/lib/mysql的拥有者改为当前用户,将openscanner换成你自己的centos用户
sudo chown -R openscanner:openscanner /var/lib/mysql
然后,重启服务:
service mysqld restart
接下来登录重置密码:
-
#输入完下面的命令后直接2次回车,刚安装的mysql不需要密码即可登录
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mysql -u root -p
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#使用mysql数据库
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use mysql;
-
-
#更新密码
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update user set password=password('123456') where user='root';
-
-
#退出
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exit;
5. 需要更改权限才能实现远程连接MYSQL数据库
可以通过以下方式来确认:
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mysql -h localhost -uroot -p
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-
Enter password: ******
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Welcome to the MySQL monitor. Commands end with ; or \g.
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Your MySQL connection id is 4 to server version: 4.0.20a-debug
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Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the buffer.
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mysql> use mysql; (此DB存放MySQL的各种配置信息)
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Database changed
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mysql> select host,user from user; (查看用户的权限情况)
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mysql> select host, user, password from user;
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+-----------+------+-------------------------------------------+
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| host | user | password |
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+-----------+------+-------------------------------------------+
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| localhost | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 |
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| 127.0.0.1 | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 |
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| localhost | | |
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+-----------+------+-------------------------------------------+
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4 rows in set (0.01 sec)
由此可以看出,只能以localhost的主机方式访问。 解决方法:
mysql> Grant all privileges on *.* to 'root'@'%' identified by '123456' with grant option;
(%表示是所有的外部机器,如果指定某一台机,就将%改为相应的机器名;‘root’则是指要使用的用户名,)
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# 运行此句才生效,或者重启MySQL)
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mysql> flush privileges;
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Query OK, 0 rows affected (0.03 sec)
再次查看。。
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mysql> select host, user, password from user;
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+-----------+------+-------------------------------------------+
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| host | user | password |
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+-----------+------+-------------------------------------------+
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| localhost | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 |
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| 127.0.0.1 | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 |
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| localhost | | |
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| % | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 |
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+-----------+------+-------------------------------------------+
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4 rows in set (0.01 sec)
原文地址:https://www.cnblogs.com/julyme/p/5969626.html
文章来源: yexindong.blog.csdn.net,作者:java叶新东老师,版权归原作者所有,如需转载,请联系作者。
原文链接:yexindong.blog.csdn.net/article/details/82849481
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