1)首先，使用Composer下载Laravel安装程序:

编译器需要“laravel/installer”

2)确保将~/.composer/vendor/bin目录放在你的PATH中，这样laravel可执行文件就可以被你的系统定位。

  set PATH=%PATH%;%USERPROFILE%\AppData\Roaming\Composer\vendor\bin

  eg: “C:\Users\\AppData\Roaming\Composer\vendor\bin” 

3)安装后，简单的laravel new命令将在您指定的目录中创建一个新的laravel安装。

eG:  laravel new blog

如果在mac上(想想*nix)，在你的终端上运行这个。

export PATH="~/.composer/vendor/bin:$PATH" 

如果你已经全局安装了Composer，你可以使用下面的命令安装Laravel安装工具:

composer global require "laravel/installer=~1.1"

终端类型:

nano ~/.bash_profile 

然后粘贴:

export PATH="/Users/yourusername/.composer/vendor/bin:$PATH"

然后保存(按ctrl+c，按Y，按enter)

现在，您可以在终端上使用“laravel”了

解决方案链接http://tutsnare.com/laravel-command-not-found-ubuntu-mac/

在终端

# download installer
composer global require "laravel/installer=~1.1"
#setting up path
export PATH="~/.composer/vendor/bin:$PATH" 
# check laravel command
laravel 

# download installer
composer global require "laravel/installer=~1.1"

nano ~/.bashrc

#add

alias laravel='~/.composer/vendor/bin/laravel'

source ~/.bashrc

laravel

# going to html dir to create project there
cd /var/www/html/
# install project in blog dir.
laravel new blog

就用它吧:

composer create-project --prefer-dist laravel/laravel youprojectname