Install zsh and take it to default shell sudo apt-get update&& sudo apt-get install zsh
After install,run: chsh -s $(which zsh)
then, echo $SHELL ,it should be (usr)/bin/zsh
IF change don't happen,relogin then reopen your item/terminal,until get correct.
Install oh my zsh sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"
The most useful for me is the git plugin,it's enable by default,and a theme 'af-magic'. oh_my_zsh