ROS : unable to process source ; urlopen error timed out

jeremyma@jeremyma-virtual-machine:~$ sudo rosdep init Wrote/etc/ros/rosdep/sources.list.d/20-default.list Recommended: please run rosdep update
jeremyma@jeremyma-virtual-machine:~$ rosdep update reading in sources list data from/etc/ros/rosdep/sources.list.d 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) Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/base.yaml Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/python.yaml Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/ruby.yaml Hit https://raw.githubusercontent.com/ros/rosdistro/master/releases/fuerte.yaml Query rosdistro index https://raw.githubusercontent.com/ros/rosdistro/master/index-v4.yaml Skip end-of-life distro “ardent” Skip end-of-life distro “bouncy” Add distro “crystal” Add distro “dashing” Add distro “eloquent” Skip end-of-life distro “groovy” Skip end-of-life distro “hydro” Skip end-of-life distro “indigo” Skip end-of-life distro “jade” Add distro “kinetic” Skip end-of-life distro “lunar” Add distro “melodic” Add distro “noetic” updated cache in/home/jeremyma/.ros/rosdep/sources.cache ERROR: Not all sources were able to be updated. [[[ 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) ]]] jeremyma@jeremyma-virtual-machine:~$sudo apt-get update 적중: 1http://cn.archive.ubuntu.com/ubuntuxenial InRelease 적중: 2http://packages.ros.org/ros/ubuntutrusty InRelease 획득: 3http://security.ubuntu.com/ubuntuxenial-security InRelease [109 kB] 획득: 4http://cn.archive.ubuntu.com/ubuntuinRelease [109 kB] 적중: 5https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/ubuntuxenial InRelease 적중: 6https://packagecloud.io/github/git-lfs/ubuntuxenial InRelease 무시: 4http://cn.archive.ubuntu.com/ubuntuxenial-updates InRelease 획득: 7http://cn.archive.ubuntu.com/ubuntuxenial-backports InRelease [107 kB] 획득: 8http://cn.archive.ubuntu.com/ubuntuxenial-updates Release [108 kB] 획득: 9http://cn.archive.ubuntu.com/ubuntu xenial-updates Release.gpg [916 B] 무시: 3http://security.ubuntu.com/ubuntuxenial-security InRelease 획득: 10http://security.ubuntu.com/ubuntuxenial-security Release [108 kB] 획득: 11http://security.ubuntu.com/ubuntu xenial-security Release.gpg [916B] 325kB 다운로드, 2분 59초 소요(1811B/s) 패키지 목록 읽기... 완료jeremyma@jeremyma-virtual-machine:~$ sudo rosdep init ERROR: default sources list file already exists:/etc/ros/rosdep/sources.list.d/20-default.list Please delete if you wish to re-initialize jeremyma@jeremyma-virtual-machine:~$ rosdep update reading in sources list data from/etc/ros/rosdep/sources.list.d Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/osx-homebrew.yaml Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/base.yaml Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/python.yaml Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/ruby.yaml Hit https://raw.githubusercontent.com/ros/rosdistro/master/releases/fuerte.yaml Query rosdistro index https://raw.githubusercontent.com/ros/rosdistro/master/index-v4.yaml Skip end-of-life distro “ardent” Skip end-of-life distro “bouncy” Add distro “crystal” Add distro “dashing” Add distro “eloquent” Skip end-of-life distro “groovy” Skip end-of-life distro “hydro” Skip end-of-life distro “indigo” Skip end-of-life distro “jade” Add distro “kinetic” Skip end-of-life distro “lunar” Add distro “melodic” Add distro “noetic” updated cache in/home/jeremyma/.ros/rosdep/sources.cache

echo "source /opt/ros/indigo/setup.bash" >> ~/.bashrc  
source ~/.bashrc  

jeremyma@jeremyma-virtual-machine:~$ roscore … logging to/home/jeremyma/.ros/log/c2150816-f245-11e9-966d-000c296d6763/roslaunch-jeremyma-virtual-machine-51987.log Checking log directory for disk usage. This may take awhile. Press Ctrl-C to interrupt Done checking log file disk usage. Usage is <1GB. started roslaunch server http://jeremyma-virtual-machine:41693/ros_comm version 1.11.16 **SUMMARY ========* PARAMETERS

/rosdistro: Debian

/rosversion: 1.11.16 NODES auto-starting new master process[master]: started with pid [52002] ROS_MASTER_URI=http://jeremyma-virtual-machine:11311/setting/run_id to c2150816-f245-11e9-966d-000c296d6763 process[rosout-1]: started with pid [52015] started core service [/rosout]*