TROUBLE:
Update WordPress
Downloading update from https://downloads.wordpress.org/release/wordpress-4.6.1-no-content.zip…
Unpacking the update…
The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.: wp-admin/includes/update-core.php
Installation Failed
FIX was this:
sudo find /nas/content/live/cdbackslash/ -type f -exec chmod 664 {} \;
sudo find /nas/content/live/cdbackslash/ -type d -exec chmod 775 {} \;
sudo find /nas/content/live/cdbackslash/ -exec chown www-data:www-data {} \;
ASSIST:
https://aaronjholbrook.com/wordpress-permissions-update-error-resolved/