What it does? It cleans apt cache. Remove old config files. Remove old kernels. Empty every trashes. What you can do is to save the script on your Desktop. Make it executable and clean kali linux. Ex: root@kali:~/Desktop# ./kali_cleaner.sh Download: https://github.com/MasterButcher/kali-cleaner or you can use command in terminal: git clone https://github.com/MasterButcher/kali-cleaner.git