title: npm global install commands not found on zsh
body: <p>I just installed the package live-server using 
  <code>npm install -g live server</code></p>
  
  <p>I checked and the package is currently installed at</p>
  
  <p><code>/Users/username/.npm-global/lib/node_modules/live-server/live-server.js</code></p>
  
  <p>However, when I try to run live-server from the command line I get the error</p>
  
  <p><code>zsh: command not found: live-server</code></p>
  
  <p>What do I need to do to be able to run live-server? I have oh-my-zsh installed and I'm worried that may be causing my issue. I understand it should have something to do with setting my PATH but I'm not sure what.</p>
  
  <p>Running <code>echo $PATH</code> results in:</p>
  
  <p><code>/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin:/opt/ImageMagick/bin:/Users/username/npm-global/bin:/Users/username/npm-global/bin:/Users/username/npm-global/lib</code></p>
  
  <p>Here are some files in my root directory that may be relevant.</p>
  
  <p>Thank you</p>
  
  <p>.zshrc</p>
  
  <pre><code># If you come from bash you might have to change your $PATH.
  # export PATH=$HOME/bin:/usr/local/bin:$PATH
  
  # Path to your oh-my-zsh installation.
  export ZSH=/Users/username/.oh-my-zsh
  
  # Set name of the theme to load. Optionally, if you set this to "random"
  # it'll load a random theme each time that oh-my-zsh is loaded.
  # See https://github.com/robbyrussell/oh-my-zsh/wiki/Themes
  ZSH_THEME="robbyrussell"
  
  # Set list of themes to load
  # Setting this variable when ZSH_THEME=random
  # cause zsh load theme from this variable instead of
  # looking in ~/.oh-my-zsh/themes/
  # An empty array have no effect
  # ZSH_THEME_RANDOM_CANDIDATES=( "robbyrussell" "agnoster" )
  
  # Uncomment the following line to use case-sensitive completion.
  # CASE_SENSITIVE="true"
  
  # Uncomment the following line to use hyphen-insensitive completion. Case
  # sensitive completion must be off. _ and - will be interchangeable.
  # HYPHEN_INSENSITIVE="true"
  
  # Uncomment the following line to disable bi-weekly auto-update checks.
  # DISABLE_AUTO_UPDATE="true"
  
  # Uncomment the following line to change how often to auto-update (in days).
  # export UPDATE_ZSH_DAYS=13
  
  # Uncomment the following line to disable colors in ls.
  # DISABLE_LS_COLORS="true"
  
  # Uncomment the following line to disable auto-setting terminal title.
  # DISABLE_AUTO_TITLE="true"
  
  # Uncomment the following line to enable command auto-correction.
  # ENABLE_CORRECTION="true"
  
  # Uncomment the following line to display red dots whilst waiting for completion.
  # COMPLETION_WAITING_DOTS="true"
  
  # Uncomment the following line if you want to disable marking untracked files
  # under VCS as dirty. This makes repository status check for large repositories
  # much, much faster.
  # DISABLE_UNTRACKED_FILES_DIRTY="true"
  
  # Uncomment the following line if you want to change the command execution time
  # stamp shown in the history command output.
  # The optional three formats: "mm/dd/yyyy"|"dd.mm.yyyy"|"yyyy-mm-dd"
  # HIST_STAMPS="mm/dd/yyyy"
  
  # Would you like to use another custom folder than $ZSH/custom?
  # ZSH_CUSTOM=/path/to/new-custom-folder
  
  # Which plugins would you like to load? (plugins can be found in ~/.oh-my-zsh/plugins/*)
  # Custom plugins may be added to ~/.oh-my-zsh/custom/plugins/
  # Example format: plugins=(rails git textmate ruby lighthouse)
  # Add wisely, as too many plugins slow down shell startup.
  plugins=(
    git
  )
  
  source $ZSH/oh-my-zsh.sh
  
  # User configuration
  
  # export MANPATH="/usr/local/man:$MANPATH"
  
  # You may need to manually set your language environment
  # export LANG=en_US.UTF-8
  
  # Preferred editor for local and remote sessions
  # if [[ -n $SSH_CONNECTION ]]; then
  #   export EDITOR='vim'
  # else
  #   export EDITOR='mvim'
  # fi
  
  # Compilation flags
  # export ARCHFLAGS="-arch x86_64"
  
  # ssh
  # export SSH_KEY_PATH="~/.ssh/rsa_id"
  
  # Set personal aliases, overriding those provided by oh-my-zsh libs,
  # plugins, and themes. Aliases can be placed here, though oh-my-zsh
  # users are encouraged to define aliases within the ZSH_CUSTOM folder.
  # For a full list of active aliases, run `alias`.
  #
  # Example aliases
  # alias zshconfig="mate ~/.zshrc"
  # alias ohmyzsh="mate ~/.oh-my-zsh"
  export PATH=$PATH:/Users/username/npm-global/bin
  export PATH=$PATH:/Users/username/npm-global/lib
  </code></pre>