MySQL8.0.21升级到8.0.28(Linux)

需要提前准备好MySQL8.0.28的压缩包文件

1. 1 查看当前mysql版本

1. 2 停止当前运行的mysql

service mysqld stop

1. 3 将下载好的压缩包导入(8.0.28),解压压缩包

sudo tar -xvf mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz -C /usr/local/

1. 4 修改之前的文件名,将mysql改为mysqlold

sudo mv /usr/local/mysql/ /usr/local/mysqlold

1. 5 修改新解压的文件名

sudo mv /usr/local/mysql-8.0.28-linux-glibc2.12-x86_64/ /usr/local/mysql

1. 6 修改配置文件

sudo vi /etc/my.cnf

修改前: datadir=/usr/local/mysql/data

修改后: datadir=/usr/local/mysqlold/data

也可以不修改配置文件,进行data目录的拷贝

cp -r /usr/local/mysql8021/data /usr/local/mysql/data
sudo chmod -R 777 /usr/local/mysql/data/
cd /usr/local/mysql/data
chmod +777 ../* -R
chown -R mysql:mysql /usr/local/mysql/
chown -R mysql:mysql /usr/local/mysql/data/

1. 7 拷贝启动文件到/etc/init.d/下并重命名为mysqld

sudo cp /usr/local/mysql/support-files/mysql.server  /etc/init.d/mysqld

1. 8 增加执行权限

sudo chmod 777 /etc/init.d/mysqld

1. 9 删除之前的软连接

rm -rf /usr/bin/mysql

1. 创建新的软连接

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

1. 10 启动mysql服务

service mysql start

1. 11登录数据库,查看版本