Как сменить права файла на "доступен всем"

[FileJunkie]

Подробнее - смотрите инструкцию по установке и phpBB:

Decompress the phpBB 2 archive to a local directory on your system. 
Upload all the files contained in this archive (retaining the directory structure) to a web accessible directory on your server or hosting account. 
Change the permissions on config.php to be writeable by all 
Using your web browser visit the location you placed phpBB 2 with the addition of install/install.php, e.g. http://www.mydomain.com/phpBB2/install/install.php, http://www.mydomain.com/forum/install/install.php etc. 
Fill out all the requested information and hit Submit 
Change the permissions on config.php to be writeable only by yourself 
Click the Complete Installation button or revisit the location you entered above. 
phpBB 2 should now be available, please MAKE SURE you read at least Section 8 below for important, security related post-installation instructions.