You may not find find and grep on all devices, so probably your safe bet is
$ adb shell ls -lR | grep filename_you_want
on Linux/OSX, or
> adb shell ls -lR | find "filename_you_want"
on Windows.
You may not find find and grep on all devices, so probably your safe bet is
$ adb shell ls -lR | grep filename_you_want
on Linux/OSX, or
> adb shell ls -lR | find "filename_you_want"
on Windows.