MediaWiki - enable file upload

Images are stored in /var/www/mediawiki/images Go to /var/www/mediawiki and type

sudo chmod -R 755 ./images/
sudo chown -R www-data:www-data images/

Also make sure php.ini (/etc/php/8.1/cli/php.ini) has file_uploads = on

Enable Media Wiki when access fails from Browser

sudo chown -R www-data:www-data /var/www/mediawiki