chsh -s /usr/bin/zsh

I changed my shell from bash to zsh this morning.

jrblevin@syd:~$ chsh
Password: 
Changing the login shell for jrblevin
Enter the new value, or press ENTER for the default
        Login Shell [/bin/bash]: /usr/bin/zsh

There are a lot of example .zshrc on dotfiles.org. Here are some of the settings from mine:

# history
HISTFILE=~/.zsh_history
HISTSIZE=5000
SAVEHIST=1000

# Emacs keybindings (-v for vi)
bindkey -e

# settings
setopt correct_all              # correct misspelled commands
setopt autocd                   # cd by typing directory name
setopt hist_ignore_dups         # ignore repeated commands

# programs
export EDITOR=vi                # default editor

# aliases
if ls -F --color=auto >&/dev/null; then
  eval `dircolors -b`
  alias ls="ls --color=auto -F"
else
  alias ls="ls -F"
fi
alias grep='grep --color=auto'

# tab completion
autoload -U compinit
compinit

# colorful completion listings
zmodload -i zsh/complist
zstyle ':completion:*' list-colors ${(s.:.)LS_COLORS}