• 安装mysql

  apt-get install mysql-server
  

  mysql8在初始化后不允许配置大小写敏感。修改配置文件也没用

解决方案：

1. 先安装；
2. 修改配置文件，添加lower_case_table_names=1,备份该配置文件；
3. 卸载mysql；
4. 保留修改后的配置文件的情况下重装mysql；

This worked for me on a fresh Ubuntu Server 20.04 installation with MySQL 8.0.20 (no existing databases to care about - so if you have important data then you should backup/export it elsewhere before doing this):

So… I did everything with elevated permissions:

# Install MySQL 
apt-get install mysql-server
# Backup configuration file, uninstall it, delete all databases and MySQL related data
cp /etc/mysql/mysql.conf.d/mysqld.cnf /etc/mysql/mysql.conf.d/mysqld.cnf.backup
service mysql stop
apt-get --purge autoremove mysql-server
rm -R /var/lib/mysql

# Restore saved configuration file, edit the file
cp /etc/mysql/mysql.conf.d/mysqld.cnf.backup /etc/mysql/mysql.conf.d/mysqld.cnf
vim /etc/mysql/mysql.conf.d/mysqld.cnf
 
...
lower_case_table_names=1
...


# Reinstall MySQL (keeping the configuration file), configure additional settings
apt-get install mysql-server
service mysql start
#mysql_secure_installation
sudo mysql -uroot -p
 
SHOW VARIABLES LIKE 'lower_case_%';
exit

重新安装mysql时，会提示本地已经有mysqld.cnf这个配置文件，让你选使用下载来的包里的配置文件还是你本地的。记得选本地的，不要让他覆盖回去。