descrip problem when debug ros
problem: sudo rosdep init fail!! rosdep update solved: sudo gedit /etc/hosts 199.232.28.133 raw.githubusercontent.com 151.101.228.133 raw.github.com
resolve2: 1.更新rosdep相关文件，增加代理地址
rm rosdep_update.sh ; wget https://gitee.com/ncnynl/rosdep/raw/master/rosdep_update.sh ; sudo chmod +x ./rosdep_update.sh; sudo ./rosdep_update.sh
完成之后，运行rosdep update即不会出现错误提示 脚本只能运行一次，多次运行，会提示重复运行信息
2.恢复rosdep相关文件，去掉代理地址
rm rosdep_recover.sh ; wget https://gitee.com/ncnynl/rosdep/raw/master/rosdep_recover.sh ; sudo chmod +x ./rosdep_recover.sh; sudo ./rosdep_recover.sh