Linux中安装Mysql8(超完整 含远程连接+错误分析)

1. Linux版mysql8.0.18下载地址

链接：https://pan.baidu.com/s/19eezB3MAKbHKT1pOCc4I9w 提取码：74cr

2. 卸载系统自带的mariadb-lib

查看mariadb版本

rpm -qa | grep mariadb

卸载mariadb

rpm -e mariadb-libs-5.5.56-2.el7.x86_64 --nodeps

重启机器

reboot

3. 上传安装包并解压

将mysql-8.0.18-1.el8.x86_64.rpm-bundle.tar安装包上传到/opt/software目录解压mysql安装包到/opt/server目录tar -xvf mysql-8.0.13-1.el7.x86_64.rpm-bundle.tar -C /opt/server

4. 按顺序安装

必须安装(注意顺序)

rpm -ivh mysql-community-common-8.0.13-1.el7.x86_64.rpm

rpm -ivh mysql-community-libs-8.0.13-1.el7.x86_64.rpm

rpm -ivh mysql-community-client-8.0.13-1.el7.x86_64.rpm

rpm -ivh mysql-community-server-8.0.13-1.el7.x86_64.rpm

非必要安装（注意顺序）

rpm -ivh mysql-community-libs-compat-8.0.13-1.el7.x86_64.rpm

rpm -ivh mysql-community-embedded-compat-8.0.13-1.el7.x86_64.rpm

rpm -ivh mysql-community-devel-8.0.13-1.el7.x86_64.rpm

rpm -ivh mysql-community-test-8.0.13-1.el7.x86_64.rpm

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如果报以下错误

错误1

解决办法

yum install numactl

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错误2

解决办法

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

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错误3

解决办法

yum -y install autoconf

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错误4

解决办法

yum install perl.x86_64 perl-devel.x86_64 -yyum install perl-JSON.noarch -y

5. 初始化数据库

mysqld --initialize --console

6. 目录授权，否则启动失败

chown -R mysql:mysql /var/lib/mysql/

7. 启动mysql服务

systemctl start mysqld将mysql服务设置为开机启动systemctl enable mysqldsystemctl daemon-reload

8. 查看msyql服务的状态

service mysqld status

9. 在/var/log/mysqld.log下查看临时密码

cat /var/log/mysqld.log

10. 用临时密码登录到数据库

mysql -u root -p输入临时密码（输入时不会显示出来，输入完直接回车）

11. 执行下面mysql命令   修改密码

alter USER 'root'@'localhost'IDENTIFIED BY '新密码';

12. 依次执行下列mysql命令 授权远程连接

查看所有用户是否可以远程连接，依次执行下列命令：

show databases;

use mysql;

select host, user, authentication_string, plugin from user;

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host为localhsot，说明用户只能本地连接msyql服务

修改root用户host值，使root用户可以远程登录

update user set host = "%" where user='root';

刷新

flush privileges;

开启mysql远程访问权限

use mysql;

alter USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'root用户的密码';

flush privileges; ·