MIller's profile - activity

yes, it works. I remove it first and then try again, it installed! thank you!

Yes, thank you, and I learn two more command: apt-get clean and apt-get update

Thank you ! I directly download the latest file from website to my computer, and then installed by Ubuntu software center. ros-hydro-rqt_0.2.14-0precise-20140311-2004-+0000_amd64.deb

I checked this directory: the coorsponding file has update to http://packages.ros.org/ros/ubuntu/pool/main/r/ros-hydro-rqt/ros-hydro-rqt_0.2.14-0precise-20140311-2004-+0000_amd64.deb So the system cannnot find it. But how can I fix this problem?

Err http://packages.ros.org/ros/ubuntu/ precise/main ros-hydro-rqt amd64 0.2.13-0precise-20140130-2154-+0000 404 Not Found

Internate is in good condition, ping time is within 30 ms.

I delete the “//” by myself becase my account cann't post content with link.

system: ubuntu 12.04 LTS ROS version 1.9.54 I try to install ros-hydro-rqt, but failed.

sudo apt-get install ros-hydro-rqt
Failed to fetch http:packages.ros.org/ros/ubuntu/pool/main/r/ros-hydro-rqt/ros-hydro-rqt_0.2.13-0precise-20140130-2154-+0000_amd64.deb  Something wicked happened resolving 'packages.ros.org:http' (-5 - No address associated with hostname)
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

I use

rosservice call spawn 2 2 0 "NewTurtle"

to create another turtle on the screen, how to use turtle_teleop_key command to control it? It like this command only can control the first turtle.