1 下载

下载链接

https://dev.mysql.com/downloads/mysql/

确认linux对应的版本：

cat /proc/version

uname -a

lsb_release -a

cat /etc/redhat-release

cat /etc/issue

这个是内核的版本：

3.10.0-1062.9.1.el7.x86_64

选择操作系统版本:

2.解压mysql的tar格式文件

 tar -xvf mysql-8.0.20-1.el7.x86_64.rpm-bundle.tar

运行上述命令，得到如下结果，有8个文件包：

也可以创建一个文件夹，在同一个子目录下解压。

3.安装解压的rpm安装包

然后我们可以用rpm -ivh命令来进行安装，注意安装顺序，因为这些包的安装是相互依赖的：

rpm -ivh mysql-community-common-8.0.20-1.el7.x86_64.rpm

rpm -ivh mysql-community-libs-8.0.20-1.el7.x86_64.rpm

rpm -ivh mysql-community-client-8.0.20-1.el7.x86_64.rpm

rpm -ivh mysql-community-server-8.0.20-1.el7.x86_64.rpm

rpm -ivh mysql-community-libs-compat-8.0.20-1.el7.x86_64.rpm

rpm -ivh mysql-community-embedded-compat-8.0.20-1.el7.x86_64.rpm

rpm -ivh mysql-community-devel-8.0.20-1.el7.x86_64.rpm

rpm -ivh mysql-community-test-8.0.20-1.el7.x86_64.rpm

出现问题：error:

Failed dependencies:

libnuma.so.1()(64bit) is needed by mysql-community-server-8.0.13-1.el7.x86_64 libnuma.so.1(libnuma_1.1)(64bit) is needed by mysql-community-server-8.0.13-1.el7.x86_64 libnuma.so.1(libnuma_1.2)(64bit) is needed by mysql-community-server-8.0.13-1.el7.x86_64

解决办法：

yum install numactl

出现问题：error:

Failed dependencies:pkgconfig(openssl) is needed by mysql-community-devel-8.0.13-1.el7.x86_64

解决办法：

yum install openssl-devel.x86_64 openssl.x86_64 -y

出现问题：error:

Failed dependencies:perl(Data::Dumper) is needed by mysql-community-test-8.0.13-1.el7.x86_64

解决办法：

yum -y install autoconf

出现问题：error:

Failed dependencies:perl(JSON) is needed by mysql-community-test-8.0.13-1.el7.x86_64

解决办法：

yum install perl.x86_64 perl-devel.x86_64 -y

yum install perl-JSON.noarch -y

出现问题：error:

error: Failed dependencies:libaio.so.1()(64bit) is needed by MySQL-server-5.5.25a-1.rhel5.x86_64libaio.so.1(LIBAIO_0.1)(64bit) is needed by MySQL-server-5.5.25a-1.rhel5.x86_64

libaio.so.1(LIBAIO_0.4)(64bit) is needed by MySQL-server-5.5.25a-1.rhel5.x86_64

解决办法：

yum install libaio

以上我们的MySQL就安装好了，下面可以直接使用了。

4.使用数据库

• 初始化数据库

mysqld --initialize --console

所以在初始化之前，记得授权，命令为：chown -R mysql:mysql /var/lib/mysql/

命令：systemctl start mysqld

service mysqld stop

service mysqld status

当看到Active后面是active(runing)说明启动成功了

4.修改数据库密码

当我们输入mysql -u root -p需要输入密码，我们可以去mysqld.log里面查看一下临时密码：

cat /var/log/mysqld.log

• 下面我们就可以使用你的临时密码登录数据库

mysql -u root -p+回车
输入临时密码

修改命令：alter USER 'root'@'localhost' IDENTIFIED BY '新密码(必须包含：数字大小写字母特殊字符，长度最小为8位)';

后面一定要加分号，不然无效

然后ctrl+d退出，重新进入就可以了，

输入命令

show databases;

use mysql;

正常就可以了