Bash lacks support for autosuggestions and syntax highlighting.Fish is great, but its incompatibility with Bash syntax leads to some compatibility issues.Zsh is the only option left.

1. apt install zsh-autosuggestions zsh-common zsh or dnf install zsh zsh-autosuggestions zsh-syntax-highlighting
2. cd to /etc/zsh/ in whonix-gateway template and delete /etc/zsh/zshrc and /etc/zsh/zprofile otherwise copy to other vm wil fail.
3. Copy /etc/zsh/ from whonix-gateway template to fedora/debiantemplete and replace the original /etc/zsh if exists.
4. In debian, run

   ln -s /etc/zsh/zprofile.dist /etc/zsh/zprofile
   ln -s /etc/zsh/zshrc.dist /etc/zsh/zshrc
   

5. In fedora, run

   rm /etc/zshrc /etc/zprofile
   ln -s /etc/zsh/zprofile.dist /etc/zprofile
   ln -s /etc/zsh/zshrc.dist /etc/zshrc
   

6. Change shell

   sudo chsh -s /usr/bin/zsh user
   sudo chsh -s /usr/bin/zsh
   

7. Create empty ~/.zshrc in template's. For the appvm that already create, just select 0 when you first launch zsh.

Now you can use zsh everywhere with autosuggestions and syntax-highlighting