备份默认源：

sudo cp /etc/apt/source.list /etc/apt/source.list.bak

sudo vi /etc/apt/source.list
deb http://mirrors.aliyun.com/kali kali-rolling main non-free contrib
deb-src http://mirrors.aliyun.com/kali kali-rolling main non-free contrib

更新：

sudo apt update

sudo apt upgrade