If you set up a directory with all access except delete and delete child, and the access control lists (ACL) of new files are inherited, then you can create a file without being able to delete it.

• 如果创建一个具有除删除和删除子目录或文件权限的目录，并且新文件的访问权限是继承的，你可以创建一个文件并不具有删除权限。