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Problem configuration with roscore?

Hi, I recently install Ros Kinetic, using the tutorials, but I've seen some troubles while I launch the roscore, because it only launch when I have internet connection.

:~$ roscore ... logging to /home/luigi/.ros/log/8a34264e-89af-11e7-b0b2-3bf20ac5beb2/roslaunch-ubuntu-4007.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.

Unable to contact my own server at [http://ubuntu:36413/]. This usually means that the network is not configured properly.

A common cause is that the machine cannot ping itself. Please check for errors by running:

ping ubuntu

For more tips, please see

http://www.ros.org/wiki/ROS/NetworkSetup

The traceback for the exception was written to the log file

**But ,when I get internet conection, there's no problem

:~$ roscore ... logging to /home/luigi/.ros/log/5375e854-89af-11e7-b0b2-3bf20ac5beb2/roslaunch-ubuntu-3860.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://ubuntu:39853/ ros_comm version 1.12.7

SUMMARY

PARAMETERS * /rosdistro: kinetic * /rosversion: 1.12.7

NODES

auto-starting new master process[master]: started with pid [3871] ROS_MASTER_URI=http://ubuntu:11311/

setting /run_id to 5375e854-89af-11e7-b0b2-3bf20ac5beb2 process[rosout-1]: started with pid [3884] started core service [/rosout]

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Problem configuration with roscore?

Hi, I recently install Ros Kinetic, using the tutorials, but I've seen some troubles while I launch the roscore, because it only launch when I have internet connection.

:~$ roscore
... logging to /home/luigi/.ros/log/8a34264e-89af-11e7-b0b2-3bf20ac5beb2/roslaunch-ubuntu-4007.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.

<1GB. Unable to contact my own server at [http://ubuntu:36413/]. This usually means that the network is not configured properly.

properly. A common cause is that the machine cannot ping itself. Please check for errors by running:

running:

    ping ubuntu

For more tips, please see

see

    http://www.ros.org/wiki/ROS/NetworkSetup

The traceback for the exception was written to the log file

file

**But ,when I get internet conection, there's no problem

:~$ roscore
... logging to /home/luigi/.ros/log/5375e854-89af-11e7-b0b2-3bf20ac5beb2/roslaunch-ubuntu-3860.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.

<1GB. started roslaunch server http://ubuntu:39853/ ros_comm version 1.12.7

SUMMARY

1.12.7 SUMMARY ======== PARAMETERS * /rosdistro: kinetic * /rosversion: 1.12.7

NODES

1.12.7 NODES auto-starting new master process[master]: started with pid [3871] ROS_MASTER_URI=http://ubuntu:11311/

ROS_MASTER_URI=http://ubuntu:11311/ setting /run_id to 5375e854-89af-11e7-b0b2-3bf20ac5beb2 process[rosout-1]: started with pid [3884] started core service [/rosout]

[/rosout]