ROS安装：sudo rosdep init&&rosdep update报错 解决办法

Ubuntu16.04 安装ROS Kinetic时，有两句命令总是报错，记录一下解决方法。

$sudo rosdep init

出现报错

ERROR: cannot download default sources list from:
https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/sources.list.d/20-default.list
Website may be down.

$rosdep update

出现报错

ERROR: unable to process source [https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/osx-homebrew.yaml]:
     (https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/osx-homebrew.yaml)

方法一：最好用的方法就是用ssr，并在终端也配置好：

export http_proxy=http://ip:端口
export https_proxy=http://ip:端口

方法二：

$sudo gedit /etc/hosts

 最下边一行加上：

199.232.28.133 raw.githubusercontent.com

然后保存重试

方法三：在前两个方法都不行的情况下，使用最麻烦的方法，手写20-default.list文件，拷贝.ros文件夹。

第一步：手写20-default.list文件：

$sudo mkdir -p /etc/ros/rosdep/sources.list.d
$cd /etc/ros/rosdep/sources.list.d
$sudo gedit 20-default.list

复制以下内容粘贴进去保存

# os-specific listings first
yaml https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/osx-homebrew.yaml osx

# generic
yaml https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/base.yaml
yaml https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/python.yaml
yaml https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/ruby.yaml
gbpdistro https://raw.githubusercontent.com/ros/rosdistro/master/releases/fuerte.yaml fuerte

# newer distributions (Groovy, Hydro, ...) must not be listed anymore, they are being fetched from the rosdistro index.yaml instead

第二步：拷贝.ros文件夹

rosdep update命令会生成一个.ros文件夹，我将已经生成好的上传了，将我附上的资源下载到你的home目录，解压，将文件夹名字改为.ros，然后就可以进行正常使用ROS了。