[TYPO3-linux] Re: Fresh install of 6.2.4: Path /site/htdocs exists, but no file underneath it can be created.

[Neil Haskins]

It's an SELinux issue:

blog.lysender.com/2015/07/centos-7-selinux-php-apache-cannot-writeaccess-file-no-matter-what/

TL;DR

sudo chcon -t httpd_sys_rw_content_t /path/to/site -R