Cleanup Kali Linux Live Persistant USB

[hunter86_bg]

Hello friends!
I got a problem. I made a persistant usb stick and in begining i was using 120 MB of the persistent partition. After a major "apt-get update && apt-get upgrade" and installation of pyrit(ati drivers+CAL++ and calp) I lost almost 2.5 GB of space. I cleaned apt with "clean" and it solved the problem partially.
My main question is that in the persistence partition i got this output to "du" command:

root@kali:/lib/live/mount/persistence/sdb2# du -h --max-depth=1

Output:

848K	./boot
16K	./home
17M	./lib
32K	./tmp
1.5G	./usr
97M	./root
1.2M	./etc
1.3G	./.wh..wh.plnk
856K	./sbin
691M	./opt
16K	./lost+found
4.0K	./.wh..wh.orph
169M	./var
4.0K	./lib64
3.6G	.

So,what can i clean? I thought to wipe out "/opt/AMDAPP" folder and this ".wh..wh.plnk" thingy.Any other ideas ?!?

[colegagliano]

You could install Bleachbit, it's like CCleaner for Linux. Be careful with it though!

How-to:* REMOVED*

If you use it correctly, it should clear a considerable amount of space