1. Obtain Mysql source of yum
Mysql official website to get into the RPM package Download: https://dev.mysql.com/downloads/repo/yum/
2. Download and install Mysql source
2.1. Install wget, the command is not found time to avoid downloading
yum -y install wget
2.2 Download source installation package mysql
[root@localhost ~]# wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm
2.3. Mysql installation source
yum -y localinstall mysql57-community-release-el7-11.noarch.rpm
2.4. Online install mysql
yum -y install mysql-community-server
2.5. Start mysql service and set the boot
systemctl start mysqld
systemctl enable mysqld
systemctl daemon-reload
3. Modify the root password of four methods
Method 1: using the command SET PASSWORD
mysql -u root
mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpass');
方法2:用mysqladmin
mysqladmin -u root password "newpass"
如果root已经设置过密码,采用如下方法
mysqladmin -u root password oldpass "newpass"
方法3: 用UPDATE直接编辑user表
mysql -u root
mysql> use mysql;
mysql> UPDATE user SET Password = PASSWORD('newpass') WHERE user = 'root';
mysql> FLUSH PRIVILEGES;
在丢失root密码的时候,可以这样
mysqld_safe --skip-grant-tables&
mysql -u root mysql
mysql> UPDATE user SET password=PASSWORD("new password") WHERE user='root';
mysql> FLUSH PRIVILEGES;
4.配置mysql默认编码为UTF-8
- 修改/etc/my.cnf配置文件,在[mysqld]下添加编码配置.
- 保存编辑完毕后 重启mysql服务: systemctl restart mysqld
[mysqld]
character_set_server=utf8
init_connect='SET NAMES utf8'
[root@localhost ~]# vi /etc/my.cnf
5.mysql数据库的主要配置文件
- ./etc/my.cnf mysql的主配置文件
- ./var/lib/mysql mysql数据库的数据库文件存放位置
- ./var/log mysql数据库的日志输出存放位置,mysql数据库的一些日志输出存放位置都是在这个目录下。
- 因为mysql数据库是可以通过网络访问的,并不是一个单机版数据库,其中使用的协议是tcp/ip协议。mysql数据库绑定的端口号是3306,所以可以通过netstat -anp命令来查看一些Linux系统是否在监听3306这个端口号。结果如图所示,Linux系统监听的3306端口号就是我们的mysql数据库。