Kill other roscore/master processes on bourn shell

edit

This might be from another user. If it does happen even after a reboot, maybe you put something like roscore in your init files like .bashrc.

Check with e.g. rosnode list if there really is a rosmaster running.wh

ps aux|grep roscore should show you who started it.

I had this issue because the roscore was started as a service. The only way to kill it was to stop the service using:

$ sudo systemctl stop SERVICE_NAME.

I also went through the same problem. I launched the

roscore &

command in the background in a terminal. Later I exit through that terminal without killing it. Now the roscore is running in the background but we have already exit its corresponding terminal. So when in new terminal when I type

jobs

to search for tasks running in the background, then nothing appears, so it seems like roscore is not running. While if you type

roscore

command again, it will show the same message as yours. Try the commands as mentioned in previous answers:-

killall -9 roscore

I have the same problem and i solved it with method -killall -9 rosmaster

Thank you

try sudo killall -9 roscore try sudo killall -9 rosmaster
i ran sudo lsof -i :11311
had a rosmaster running under user "root" . had to use sudo to shutdown process...