Since PHP 8.4 came out and it is available in sury repo here is little update to classic tutorial https://www.howtoforge.com/ispconfig-php-ubuntu/#configuration-for-the-additional-php-versions Code: PHP 8.4 Fast-CGI settings: Path to the PHP FastCGI binary: /usr/bin/php-cgi8.4 Path to the php.ini directory: /etc/php/8.4/cgi/ PHP-FPM settings: Path to the PHP-FPM init script: php8.4-fpm Path to the php.ini directory: /etc/php/8.4/fpm/ Path to the PHP-FPM pool directory: /etc/php/8.4/fpm/pool.d The cli version for e.g. cron jobs has the name php8.4