Inscription:
Ali bought the database server is installed, but it seems vaguely before seen in which MySQL does not support Linux systems, (today deliberately looking for a bit and could not find information that is not supported, do not remember where to look up) at the time with the maria DB but when there are a lot of problems with today specifically come back again for a database, the configuration process to do some recording.
In this paper the test environment:
- CentOS 7 64-bit Minimal
- MySQL 5.7
Yum configuration source
In https://dev.mysql.com/downloads/repo/yum/ find the source rpm yum install package
rpm installation package
Install mysql source
# 下载
shell> wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm
# 安装 mysql 源
shell> yum localinstall mysql57-community-release-el7-11.noarch.rpm
Is installed successfully using the following commands to check the mysql source
shell> yum repolist enabled | grep "mysql.*-community.*"
mysql successful installation source
Installing MySQL
Use yum install command to install
shell> yum install -y mysql-community-server
Start MySQL service
In CentOS 7, a new startup / shutdown services command is systemctl start|stop
shell> systemctl start mysqld
With a systemctl statusview MySQL status
shell> systemctl status mysqld
MySQL start state
Set boot
shell> systemctl enable mysqld
# 重载所有修改过的配置文件
shell> systemctl daemon-reload
Changing the root password for local accounts
mysql After installation is complete, the resulting default password in the /var/log/mysqld.logfile. Use the grep command to find the log password.
shell> grep 'temporary password' /var/log/mysqld.log
View Temporary Password
For the first time by the initial password, use the following command to change the password
shell> mysql -uroot -p
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';
or
mysql> set password for 'root'@'localhost'=password('MyNewPass4!');
After modifying password update set statement
mysql> use mysql;
mysql> update user set password=PASSWORD('MyNewPass5!') where user='root';
mysql> flush privileges;
Note: mysql 5.7 installed by default password security check-ins (validate_password), check the default password policy requires password must contain: uppercase and lowercase letters, numbers and special symbols, and the length can not be less than eight. Otherwise it will prompt ERROR 1819 (HY000): Your password does not satisfy the current policy requirements error. View MySQL official website password details strategy
Add Telnet user
默认只允许root帐户在本地登录，如果要在其它机器上连接mysql，必须添加一个允许远程连接的帐户。或者修改 root 为允许远程连接（不推荐）
添加一个允许远程连接的帐户
mysql> GRANT ALL PRIVILEGES ON *.* TO 'zhangsan'@'%' IDENTIFIED BY 'Zhangsan2018!' WITH GRANT OPTION;
修改 root 为允许远程连接（不推荐）
mysql> use mysql;
mysql> UPDATE user SET Host='%' WHERE User='root';
mysql> flush privileges;
设置默认编码为 utf8
mysql 安装后默认不支持中文，需要修改编码。
修改 /etc/my.cnf 配置文件，在相关节点（没有则自行添加）下添加编码配置，如下：
[mysqld]
character-set-server=utf8
[client]
default-character-set=utf8
[mysql]
default-character-set=utf8
重启mysql服务，查询编码。可以看到已经改过来了
shell> systemctl restart mysqld
shell> mysql -uroot -p
mysql> show variables like 'character%';
查看编码
默认配置文件路径：
配置文件：/etc/my.cnf
日志文件：/var/log/var/log/mysqld.log
服务启动脚本：/usr/lib/systemd/system/mysqld.service
socket文件：/var/run/mysqld/mysqld.pid