$ sudo cat /etc/apt/sources.list

$ sudo cp /etc/apt/sources.list /etc/apt/sources.listbak (backup)

$ sudo nano /etc/apt/sources.list atau $ sudo vi /etc/apt/sources.list

deb https://mirrors.ocf.berkeley.edu/kali/ kali-rolling main contrib non->

# For source package access, uncomment the following line

# deb-src https://mirrors.ocf.berkeley.edu/kali/ kali-rolling main contrib>

$ sudo apt clean

$ sudo apt update && apt upgrade -y