Centos7 Yum安装MYSQL8.0详细安装步骤

### 0、更换yum源

1、打开 mirrors.aliyun.com，选择centos的系统，点击帮助

2、执行命令：yum install wget -y

3、改变某些文件的名称

```

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

```

4、执行更换yum源的命令

```

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

```

5、更新本地缓存

yum clean all

yum makecache

### 1、查看系统中是否自带安装mysql

```shell

yum list installed | grep mysql

```

### 2、删除系统自带的mysql及其依赖（防止冲突）

```shell

yum -y remove mysql-libs.x86_64

```

### 3、安装wget命令

```

yum install wget -y

```

### 4、给CentOS添加rpm源，并且选择较新的源

```

wget -i -c https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm

```

### 5、安装下载好的rpm文件

```

yum install mysql80-community-release-el7-3.noarch.rpm -y

```

### 6、使用yum安装mysql

```

yum install mysql-community-server -y

```

### 7、启动mysql服务

#启动mysql服务，查看启动状态及是否开机启动

```

systemctl start mysqld.service

systemctl status mysqld.service

systemctl list-unit-files | grep enabled

```

### 8、获取mysql的临时密码

```shell

grep "password" /var/log/mysqld.log

```

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### 9、使用临时密码登录

```shell

mysql -uroot -p

#输入密码

```

### 10、修改密码

```sql

#密码要符合mysql安全规则，否则修改不成功

ALTER USER 'root'@'localhost' IDENTIFIED BY '密码';

```

### 11、修改远程访问权限

```sql

grant all privileges on *.* to 'root'@'%' identified by '123456' with grant option;

flush privileges;

```

### 12、设置字符集为utf-8

```shell

#在[mysqld]部分添加：

character-set-server=utf8

#在文件末尾新增[client]段，并在[client]段添加：

default-character-set=utf8