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After installation melodic in ubuntu 18.04 for first time,i input "roscore" in ubuntu terminal command port, i see as follows:
Command 'roscore' not found, but can be installed with:
sudo apt install python-roslaunch
Is it right? If it's wrong,how to solve it?
Did you remember to first source /opt/ros/melodic/setup.bash before trying to run roscore?
Edit:
sudo apt install ros-melodic-desktop-fullThere isn't roscore in
/home/my name/opt/ros/melodic/bin, does it mean i didn't install successfully?
I would not expect it to be located in $HOME, but in opt/ros/melodic/bin.
What is the output of ls -al /opt/ros/melodic/bin/roscore? Do not change the path, just run that command.
Assuming you ran ls -al /opt/ros/melodic/bin/roscore and it tells you there is no such file or directory, it would seem for some reason you're missing the roscore binary.
You could try reinstalling it using:
sudo apt install --reinstall ros-melodic-roslaunch
Pay close attention to the output of apt. Perhaps it tells you why it can't / couldn't install the roslaunch package successfully.
Asked: 2020-03-30 20:05:53 -0500
Seen: 3,534 times
Last updated: Mar 31 '20
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