Search notes:

/mnt/wslg/PulseServer

/mnt/wslg/PulseServer is a socket: 
$ file -b /mnt/wslg/PulseServer
socket

See also

The value of the PULSE_SERVER environment variable is /mnt/wslg/PulseServer.
Windows Subsystem for Linux
PulseAudio
/mnt/wslg

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/Linux/fh...', 1759390759, '216.73.216.42', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/Linux/fhs/mnt/wslg/PulseServer(47): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78