I'm trying to list all network interfaces in Windows Subsystem for Linux shell but I got this error message:
Warning: cannot open /proc/net/dev (File o directory non esistente). Limited output.
Making my comment a proper answer, as of the day of this writing, the feature is probably not yet implemented.
/dev is a special file system created by the Linux kernel on demand, every part of it needs to be implemented in the Windows Subsystem for Linux