网站当然是不可能down的,问题是自己的网络被屏蔽了,没法出去。
### 解决方案1.换移动热点
具体要看当地的运营商有没有屏蔽网站,成功率不高。
### 解决方案2:更换域名服务器
这里举例子为Ubuntu系统
```shell
sudo vim /etc/resolv,conf
# 添加如下内容
nameserver 114.114.114.114
nameserver 8.8.8.8
nameserver 233.5.5.5
```
分别对应为运营商、谷歌、阿里的域名服务器
### 解决方案3:越过长城
https://baa.im/1259893这个是baacloud地址,配合一个开源的客户端clash就行。
### 解决方案4:
就是2+3一起搞
### 解决方案4:
自己把网站内容写到本地,但是治标不治本
在/etc/ros/rosdep/sources.list.d
目录下新建一个名叫20-default.list
的文件。终端命令为
```shell
mkdir -p /etc/ros/rosdep/sources.list.d cd /etc/ros/rosdep/sources.list.d
touch 20-default.list
```
写入内容:
# 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