Drupal 7：私有文件系统路径设置为/

I have a problem. I set the private path to / and now all my URLs return error 500.

Yes I'm an idiot. How do I reverse this without doing a clean install?

/Anders

You can edit that variable directly in the variable table of the database, the variable name is file_private_path. e.g.

UPDATE variable SET value = '/new/path' WHERE name = 'file_private_path'

It would probably be a good idea to manually clear Drupal's cache afterwards which simply means truncating all tables whose name begins with cache, e.g, in MySQL:

TRUNCATE TABLE cache
TRUNCATE TABLE cache_block

etc...