Introducing to zsh shell and auto-completions

What is the point to to this?

You don't need to remember all the command For example you can see all the command and help when you type git (Tab)

For ubuntu

sudo apt-get install zsh
cat /etc/shells
chsh /path/to/zsh

extentions

zsh-completions

zsh-autosuggestions

my setting file is this(but this may be different for other os)

you should set your path setting by yourself

# source ~/.zsh.d/zsh-autosuggestions/zsh-autosuggestions.zsh
# enabling color setting
autoload -Uz colors
colors
# emacs key binding
# bindkey -v

# automatically ls after cd
chpwd() { ls }

#function homestead() {
#   ( cd ~/Homestead && vagrant $* )
#}
###############################
# PATH settings <= this is up to your environment!Be careful
# export XDEBUG_CONFIG="idekey=sublime.xdebug"

# export PATH=/usr/sbin:$PATH
# export PATH=/bin:/usr/bin:/usr/local/bin:${PATH}
#mysql
# export PATH=$PATH:/usr/local/mysql/bin
#composer
# export PATH=~/.composer/vendor/bin:$PATH

# export PATH=/usr/local/bin:$PATH

# nodebrew
# export PATH=$HOME/.nodebrew/current/bin:$PATH
# geckodriver
# export PATH=$PATH:/usr/local/bin/geckodriver
# export PATH="$HOME/.anyenv/bin:$PATH"
# export PATH="$HOME/.anyenv/envs/rbenv/shims:$PATH"
# export PATH="/usr/local/sbin:$PATH"
if [ -d $HOME/.anyenv ] ; then
    export PATH="$HOME/.anyenv/bin:$PATH"
    eval "$(anyenv init -)"
    # tmux対応
    for D in `ls $HOME/.anyenv/envs/`
    do
      export PATH="$HOME/.anyenv/envs/$D/shims:$PATH"
    done
fi

fpath=(/usr/local/Cellar/zsh-completions $fpath)

########################
## history file settings
HISTFILE=~/.zsh_history
HISTSIZE=10000000
SAVEHIST=$HISTSIZE
setopt hist_ignore_dups
setopt hist_ignore_space
setopt inc_append_history
setopt share_history
setopt no_flow_control

######################
# prompt settings
# oneline
# PROMPT="%~ %# "
# two lines
PROMPT="%{${fg[green]}%}[%n@%m]%{${reset_color}%} %~
%# "

# setting for dividing word
autoload -Uz select-word-style
select-word-style default
# these letters are treated as dividing letters
zstyle ':zle:*' word-chars " /=;@:{}, |"
zstyle ':zle:*' word-style unspecified

########################################
## autocomplete
autoload -Uz compinit && compinit -u

zstyle ':completion:*' matcher-list 'm:{a-z}={A-Z}'

zstyle ':completion:*' ignore-parents parent pwd ..

zstyle ':completion:*' menu select interactive
setopt menu_complete

zstyle ':completion:*:sudo:*' command-path /usr/local/sbin /usr/local/bin 
                     /usr/sbin /usr/bin /sbin /bin /usr/X11R6/bin

zstyle ':completion:*:processes' command 'ps x -o pid, s, args'

zstyle ':completion:*' verbose yes
zstyle ':completion:*' completer _expand _complete _match _prefix _approximate _list _history
zstyle ':completion:*:messages' format '%F{YELLOW}%d'$DEFAULT
zstyle ':completion:*:warnings' format '%F{RED}No matches for:'%F{YELLOW} %d'$DEFAULT
zstyle ':completion:*:descriptions' format '%F{YELLOW}completing %B%d%b'$DEFAULT
zstyle ':completion:*:options' description 'yes'
zstyle ':completion:*:descriptions' format '%F{yellow}Completing %B%d%b%f'$DEFAULT

zstyle ':completion:*' group-name '
setopt auto_list
setopt list_packed
autoload predict-on
zle -N predict-on
zle -N predict-off
bindkey '^X^Z' predict-on
bindkey '^Z' predict-off
zstyle ':predict' verbose true
########################################
## vcs_info
autoload -Uz vcs_info
autoload -Uz add-zsh-hook

zstyle ':vcs_info:*' formats '%F{green}(%s)-[%b]%f'
zstyle ':vcs_info:*' actionformats '%F{red}(%s)-[%b|%a]%f'

function _update_vcs_info_msg() {
    LANG=en_US.UTF-8 vcs_info
    RPROMPT="${vcs_info_msg_0_}"
}
add-zsh-hook precmd _update_vcs_info_msg

########################################
## options
## enable japanese letters
setopt print_eight_bit

setopt no_beep

setopt no_flow_control

setopt ignore_eof
# after '#' treated as comments in terminal
setopt interactive_comments
# cd with only directory name
setopt auto_cd

setopt auto_pushd

setopt pushd_ignore_dups

setopt share_history

setopt hist_ignore_all_dups

setopt hist_ignore_space

setopt hist_reduce_blanks

setopt extended_glob
setopt auto_menu             # 補完キー連打で順に補完候補を自動で補完
setopt transient_rprompt
########################################
# キーバインド
# ^R で履歴検索をするときに * でワイルドカードを使用出来るようにする
bindkey '^R' history-incremental-pattern-search-backward

########################################
## aliases
alias la='ls -a'
alias ll='ls -l'

alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'

alias mkdir='mkdir -p'

#cd
alias c='cd'
alias c-='cd -'
alias ..='cd ..'
alias ...='cd ../..'
alias ....='cd ../../..'
alias .....='cd ../../../..'
alias ......='cd ../../../../..'

# grep
alias gf='grep --with-filename --line-number'
alias gr='grep --with-filename --line-number --recursive --exclude-dir=.svn'

# enable aliases for sudo commands
alias sudo='sudo '

alias -g L='| less'
alias -g G='| grep'

alias xcode="open -a Xcode"
alias subl='open -a "Sublime Text"'

# copy to clipboard by C
# mollifier delta blog : http://mollifier.hatenablog.com/entry/20100317/p1
if which pbcopy >/dev/null 2>&1 ; then
    # Mac
    alias -g C='| pbcopy'
elif which xsel >/dev/null 2>&1 ; then
    # Linux
    alias -g C='| xsel --input --clipboard'
elif which putclip >/dev/null 2>&1 ; then
    # Cygwin
    alias -g C='| putclip'
fi

########################################
# OS 別の設定
case ${OSTYPE} in
    darwin*)
        #Mac用の設定
        export CLICOLOR=1
        alias ls='ls -G -F'
        ;;
    linux*)
    #Linux用の設定
        alias ls='ls -F --color=auto'
        ;;
esac
# vim:set ft=zsh:

# source ~/.zsh.d/.git-flow-completion.zsh