下载

wget https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.21-linux-glibc2.12-x86_64.tar.xz

上传 

文件包移动到/usr/local/

cp mysql-8.0.21-linux-glibc2.12-x86_64.tar.xz  /usr/local/

 解压

tar xvJf mysql-8.0.21-linux-glibc2.12-x86_64.tar.xz

重命名 

mv mysql-8.0.21-linux-glibc2.12-x86_64 mysql-8.0

 创建用户

groupadd mysql
useradd -g mysql mysql

授权

chown -R mysql.mysql /usr/local/mysql-8.0

 进入 mysql-8.0/

  cd mysql-8.0/

创建data 

mkdir data 

进入bin

cd /bin 

 初始化

 ./mysqld --user=mysql --basedir=/usr/local/mysql-8.0 --datadir=/usr/local/mysql-8.0/data/ --initialize

环境设置 

  sudo yum install libaio

 记录密码vim/etc/my.cnf文件 

basedir=/usr/local/mysql-8.0/
datadir=/usr/local/mysql-8.0/data/
socket=/tmp/mysql.sock
character-set-server=utf8

注释mysqld_safe服务

 进入mysql8.0路径

cd../

添加mysqld服务到系统  授权及服务

 [root@localhost mysql-8.0]# cp -a ./support-files/mysql.server /etc/init.d/mysql
[root@localhost mysql-8.0]# chmod +x /etc/init.d/mysql
[root@localhost mysql-8.0]# chkconfig --add mysql

启动mysql

 service mysql start

成功则忽略 

提示MySQL.2024-05-15T10:33:12.466873Z mysqld_safe error: log-error set to '/var/log/mariadb/mariadb.log', however file don't exists

 进入var/log/

cd /var/log/

创建mariadb文件夹 添加文件mariadb.log

[root@localhost log]# mkdir mariadb
[root@localhost log]# cd mariadb/
[root@localhost mariadb]# touch mariadb.log
[root@localhost mariadb]# service mysql start

重启服务

service mysql start

添加服务

ln -s /usr/local/mysql-8.0/bin/mysql /usr/bin

登录mysql

mysql -uroot -p

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456';
flush privileges;

参考

遇到 MySQL 中的两个 Root 用户：问题分析与解决-CSDN博客