看起来你安装了 ember-tools ，而不是 ember-cli 。

确保您摆脱了ember工具：

  npm uninstall  - g ember-tools 
 

，并确保您安装了最新版本的ember-cli：

  npm install -g ember-cli 
 

I am planing to switch my ember development to ubuntu 12.04. I am new to it. It seems I have installed node and ember-cli properly, but ember new a does not do anything and fails silently.

rigel@ rigel:/$ ember --version
0.2.8
rigel@rigel:/$ npm--version
1.4.23
rigel@ rigel:/$ node -v
v0.10.31
rigel@rigel:/$ember new a
rigel@ rigel:/$

The above mentioned information might be less than is needed to troubleshoot the problem, but I need some pointers to figure out what else I should be looking at.

Looks like you installed ember-tools instead of ember-cli.

Make sure you get rid of ember-tools:

npm uninstall -g ember-tools

and make sure you have the latest version of ember-cli installed:

npm install -g ember-cli