Z-shell is a unix/Linux shell that is used to make your terminal or login shell interactive. IT gives nice look to your terminal. If you spell something wrong, Zsh can sometimes suggest a correction and re-run the command for you. When you type only one character on terminal, it will show warning message for all possible files, folders. But to install this, you must have to install zsh firstly. When you install Z-shell you can apply themes to Z-shell using oh-my-zsh plugin.
Install Z-shell using command below
sudo apt-get install zsh
Install oh-my-zsh plugin via wget, to give nice look to Z-shell
wget --no-check-certificate https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh -O - | sh
chsh -s /bin/zsh