It’s all fine now after running the following command as “god” .
sudo chown -R magento2:www-data /var/www/html/
Then run the following command as “magento2”, no need sudo cause this character at How to install Magento 2.4 and build a web server can’t run sudo command
(“Operation not permitted” comes out if run this as “god”)
find var generated vendor pub/static pub/media app/etc -type f -exec chmod g+w {} + && find var generated vendor pub/static pub/media app/etc -type d -exec chmod g+ws {} + && chmod u+x bin/magento
No more “Operation not permitted” comes out.
Thank you Mr. Craig! @digitalstartup