Centos7安装mysql8-压缩包方式

1.wget 下载资源

wget https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.15-el7-x86_64.tar.gz

2.解压

tar -zxvf mysql-8.0.15-el7-x86_64.tar.gz 

3.修改文件名，进入bin目录

mv mysql-8.0.15-el7-x86_64 msyql && cd mysql/bin

4.初始化数据库

./mysqld --initialize

5 .用root用户启动数据库

./mysqld_safe --user=root &

6.通过err文件找到初始密码,一般在data目录下

cat  mysql/data/192.168.1.4.err

7.登录数据库，修改root密码远程登录

./mysql -uroot -p 
ALTER USER 'root'@'localhost' IDENTIFIED BY 'root'; #修改密码
update user set Host='%' where User='root'; #配置远程登录
flush privileges; #刷新权限

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安装前需要卸载掉自带的MariaDB

rpm -qa |grep MariaDB
yum remove -y #####

删除默认的mysql配置文件

mv /etc/my.cnf /etc/bak-my.cnf

如果初始化没有找到root密码

关闭mysql

ps -ef |grep mysql |grep -v auto |awk '{print $2}' |xargs kill -9 

建立启动配置文件

	touch mysql_ini
	echo "ALTER USER 'root'@'localhost' IDENTIFIED BY 'root'; " >mysql_ini
	./mysql_safe --user=root  --init-file=../mysql_ini &

参考链接

https://dev.mysql.com/doc/refman/8.0/en/binary-installation.html

https://dev.mysql.com/doc/refman/8.0/en/resetting-permissions.html