How to set permissions for FTP user to update Wordpress correctly?

Question

Nginx

Good afternoon.
I can't figure out how to properly set permissions.
There is Debian+Nginx+Wordpress+Vsftpd
Everything works as it should except wordpress update and plugin update.
In the first case, the error: "cannot unpack the file", in the second, the plugins are updated, however, after the update, the .maintance file is not automatically erased
when executing sudo chown -R www-data:www-data /var/www/web-site-folder
everything works fine, but the ability to save files under the ftp user naturally falls off.
Tried adding the user to the www-data group and setting the www-data group as the primary group.
At the same time, everything happens normally in the ftp server log and not a single error. Files are downloaded, directories are created, and then the whole thing is deleted without errors.
And in the admin panel all the same:
Extracting the update ...
Checking the unpacked files ...
The update could not be unpacked
The installation failed
What can you advise? Thank you.

Answer 1

And if it's just access to the WP admin panel? And update from there?

Answer 2

Tried adding the user to the www-data group and setting the www-data group as the primary group.

So you also give the right to the group, as the owner - and everything will take off.
Z.Y. - I would probably do the opposite for simplicity - ftp:www-datalike this.

Answer 3

run ftp-server on behalf of the user and group under which the www-server is running??
of course a certain security hole, but depends on the purpose of using ftp

Answer 4

Something like this How to set permissions for linux user and www-data?

Answer 5

usermod -o -u 33 USER_NAME
Do not use without open base dir