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Run
echo "source /opt/ros/melodic/setup.bash" >> ~/.bashrc
Then after
source ~/.bashrc
Showing
bash: /otp/ros/melodic/setup.bash: No such file or directory.
it gives
deb http://packages.ros.org/ros/ubuntu (lsb_release -sc) main
The problem most likely is that lsb_release has not been setup/installed correctly, which causes the command given in the installation tutorials to produce incorrect output, leading to a malformed ros-latest.list, which then causes apt to fail downloading indices from the ROS package repositories, leading to apt install never succeeding to install ROS.
Steps to fix:
sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu bionic main" > /etc/apt/sources.list.d/ros-latest.list'
sudo apt clean && sudo apt update
Pay special attention to the output of apt update. It should not report any errors or warnings.
Now you should be able to run sudo apt install ros-melodic-desktop-full successfully, and a source /opt/ros/melodic/setup.bash should also succeed.
Note that we're avoiding the use of lsb_release -sc here by just specifying the bionic value (which is the codename of your Ubuntu distribution). If you'd like to fix lsb_release (and are sure lsb_release -sc doesn't actually output anything) you could try to do something like sudo apt install --reinstall lsb-release lsb-core and see if lsb_release -sc starts working.
Asked: 2019-08-02 05:56:56 -0500
Seen: 5,190 times
Last updated: Aug 03 '19
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is this a typo in your question or what you're actually seeing it should be
/opt/ros....This could be causing your problem.If you look at the contents of your .bashrc script you can check and fix the typo if that's the case
i copy pasted from http://wiki.ros.org/melodic/Installation/Ubuntu and it is like
Ok.
So what is the output of
ls -al /opt/ros/melodic/setup.bash?And the output of
lsb_release -a?And of
uname -a?Output of 1st
ls: cannot access '/opt/ros/melodic/setup.bash' : No such file or directory2ndNo LSB modules are available.And for 3rd one.. my PC name, Ubuntu version, GNU/LinuxWe need the verbatim, exact copy-paste of the
uname -aoutput. You can change your PC name, but leave the rest.As to the rest: it would appear that you haven't installed ROS.
unaame -aoutput asi even tried instaling LSB but it shows
Ah, that would appear to be your problem: it's likely that
apt install ros-melodic-desktop-fulldidn't actually succeed. Didn't you get an error?I'm pretty sure that the fact that
lsb_releasedoesn't work is the cause of your problems.What is the output of
cat /etc/apt/sources.list.d/ros-latest.list?