如果你是2021年来到这里，这也适用于我使用Ubuntu 16.04

nano ~/.bash_profile 
export PATH=$HOME/.config/composer/vendor/bin:$PATH
ctrl+x and save 
source ~/.bash_profile

Composer应该全局安装: 在你的终端上运行:

    mv composer.phar /usr/local/bin/composer

现在编写器命令可以工作了。

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" 

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

使用MacBook时，请参考下面的代码片段;

zsh:

echo 'export PATH="$HOME/.composer/vendor/bin:$PATH"' >>  ~/.zshrc
source ~/.zshrc

Bash的:

echo 'export PATH="$HOME/.composer/vendor/bin:$PATH"' >> ~/.bashrc
source ~/.bashrc