Written 2026-08-10 after a copy operation left /var/www/ehhspa unreadable to its own web server. Every fact below was measured on this box, not assumed. Where something is counter-intuitive the evidence is included, because the counter-intuitive ones are what bite. THE MODEL — who owns what here pathowner:groupmodewritable by the www-data group? /var/wwwspiffy-root:www-data2775✅/var/www/starterspiffy-root:www-data2775✅/var/www/starter/brainsspiffy-root:www-data2775✅a created unit (/var/www/{unit})www-data:www-data02775 […]