zsh
Installation for Ubuntu 16.04
prepare
find the shell (Bash shell) currently used
$ echo $SHELL
/bin/bash
Check on your Valid login Shells
$ cat /etc/shells
# /etc/shells: valid login shells
/bin/sh
/bin/dash
/bin/bash
/bin/rbash
/usr/bin/screen
/usr/bin/tmux
install zsh
sudo apt install zsh
$ cat /etc/shells
# /etc/shells: valid login shells
/bin/sh
/bin/dash
/bin/bash
/bin/rbash
/usr/bin/screen
/usr/bin/tmux
/bin/zsh <------------- apt install this line
/usr/bin/zsh <--------- apt install this line
Make it your default shell:
chsh -s $(which zsh)
Installation for macOS
macOS ship zsh by default
$ zsh --version
zsh 5.2 (x86_64-apple-darwin16.0)
make sure Zsh is in your authorized shells list (/etc/shells)
$ cat /etc/shells
# List of acceptable shells for chpass(1).
# Ftpd will not allow users to connect who are not using
# one of these shells.
/bin/bash
/bin/csh
/bin/ksh
/bin/sh
/bin/tcsh
/bin/zsh
Make it your default shell
$ chsh -s $(which zsh)
Log out and login back again