apt-get install python-rosdep python-rosinstall-generator python-wstool build-essential出现错误，找不到源 ，那个就要进入提示的页面：If you have trouble installing the packages in the command above, make sure you have added the packages.ros.org debian repository to your apt source lists as described starting here:
groovy/Installation/Ubuntu#groovy.2BAC8-Installation.2BAC8-Sources.Setup_your_sources.list
按照里面步骤更新源，目的是能够安装ROS的工具，安装以下依赖库
sudo apt-get install build-essential python-yaml cmake subversion wget python-setuptools mercurial git-core python-rosdep python-rospkg python-rosinstall
sudo apt-get install python-yaml libapr1-dev libaprutil1-dev libbz2-dev python-dev python-empy python-nose libgtest-dev python-paramiko libboost-all-dev liblog4cxx10-dev pkg-config
sudo apt-get install python-wxgtk2.8 python-gtk2 python-matplotlib libwxgtk2.8-dev python-imaging libqt4-dev graphviz qt4-qmake python-numpy ros-fuerte-swig-wx
wget http://peak.telecommunity.com/dist/ez_setup.py
python ez_setup.py
sudo easy_install pip
sudo pip install -U rosdep
sudo pip install -U rosinstall
sudo pip install -U rospkg
pip install -U wstool
sudo rosdep init rosdep update
mkdir ~/ros_catkin_ws cd ~/ros_catkin_ws
原文：http://blog.csdn.net/xiabodan/article/details/37565261