Ensure PHP session store exists and server user has write permission #2082
Description
All apps that include PHP (i.e. all LAMP/LAPP based apps) should have the PHP sessions dir (/var/lib/php/sessions) and it should be writable by the webserver user (www-data). It doesn't seem to cause issue for most apps - at least from my experience - but if that is not the case weird PHP app issues may occur that may not be immediately apparent and/or hard to diagnose. I.e.:
FYI SuiteCRM is tagged as that is the specific app where I discovered this issue (and have not seen it anywhere else to date). Prior to this fix being applied SuiteCRM would show "Error occurred while retrieving records" when loading most pages - although not straight away. SuiteCRM appeared to continue to be fully functional despite the error message but it's obviously better to fix it.