Clear Caches from ADB?
ADB is close, but things like adb shell pm clear &lt;package_name&gt; to clear caches (and data, oops) from selected apps requires root (as would clearing Dalvik cache). But there's a similar approach to just wipe out all app caches (not Dalvik/ART, though): fastboot erase cache would do that with the device booted into the bootloader. Details can be found e.g. here: Useful ADB and Fastboot Commands and How to Use them.