I am using a CentOs server that managed with Plesk panel. All domains have different users. I have 2 different installation of WordPress. One is installed from FTP and the other one is installed from Plesk.
WP installed from FTP cannot be updated from admin panel of WP. The error is;
Downloading update from http://wordpress.org/wordpress-3.4.2-no-content.zip…
Unpacking the update…
Could not copy files.
WP installed from Plesk can be updated successfully from admin panel of WP. So I check the permissions and file ownership and did the same as WP installed from Plesk. But it doesn't fix the issue.
PS: I know how to update from FTP. PS2: I won't disable 'define('FS_METHOD', 'direct');'.