cat: /dev/fd/63: No such file or directory. However, the cd command still works, as it changes the directory, but this message appears below the command every single time, and I'm not sure why, and I can't find anything related to this problem online, specially with Windows 10. If you write a file using the local file I/O APIs and then immediately try to access it using the DBFS CLI, dbutils.fs, or Spark APIs, you might encounter a FileNotFoundException, a file of size 0, or stale file contents. That is expected because the OS caches writes by default.