When attempting to upgrade WordPress 7.1 to 7.2 I received the following error:
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
A little Binging around and I found the solution here:
https://aaronjholbrook.com/wordpress-permissions-update-error-resolved/
Just in case that site goes down, here’s what to do:
SSH into your web server and run the following 3 commands:
Reset the permissions of all files to 664:
find /path/to/site/ -type f -exec chmod 664 {} \;
Reset permissions of directories to 775:
find /path/to/site/ -type d -exec chmod 775 {} \;
Reset the group to the apache group
chgrp -R apache /path/to/site/