centos7下使用wget命令安装mysql
首先安装wget命令:
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
安装成功后如图
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
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:
然后,重启服务:
$ service mysqld restart
接下来登录重置密码:
$ mysql -u root
mysql > use mysql;
mysql > update user set password=password(‘123456‘) where user=‘root‘;
mysql > 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:
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的各种配置信息)
Database changed
mysql> select host,user from user; (查看用户的权限情况)
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,)
mysql> flush privileges; (运行此句才生效,或者重启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)