After it's been installed as a preview in Kali Linux 2020.3, ZSH (Z Shell) is now the new default shell in Kali Linux 2020.4. ZHS brings a number of improvements over Bash and it looks better. But, if you're installing Kali Linux and you want to use Bash by default, you can simply run the chsh -s /bin/bash command. On the other hand, existing Kali Linux 2020.3 users who upgrade to Kali Linux 2020.4 will have to enable ZSH manually if they want to use it as the default shell. To do that, you must run the following commands in a terminal emulator.