Hey guys,Im relatively new to kali though not to linux.
So when I apt-get upgrade or apt-get dist-upgrade on my Rpi using re4son image,my kali goes haywire.
The panels start flickering , it starts to hang and not respond, and generally becomes ****.
What could be the problem? Due to this I'm afraid to apt-get upgrade so I havent upgraded in a while and so some problems occur when I use the tools, which will go away when I upgrade.

I'm using re4son's image because when I use the official Kali image, there is a problem with nexmon.
When i airodump-ng, I get "Missing nexutil" or something like that. Is'nt all of nexmon supposed to be installed?
Please help quickly.