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Im running Ubuntu 18.04 and trying to install ROS for the first time on my machine. I have tried to follow the instructions at: http://wiki.ros.org/melodic/Installation/Ubuntu

I get stuck at this part.

sudo apt-get install ros-melodic-desktop-full

My attempts:

sudo apt -f install

sudo apt update --fix-missing

sudo dpkg --configure -a

sudo dpkg --remove --force-remove--reinstreq

sudo apt clean

sudo apt update

sudo rm /var/lib/apt/lists/lock

sudo rm /var/cache/apt/archives/lock

Nothing has worked so far.

Terminal commands:

$sudo apt-get install ros-melodic-desktop-full
Reading package lists… Finished
Builds dependency trees
Reading state information ... Finished
Some packages could not be installed. It may mean that you have requested
an impossible situation or, if you use the unstable distribution
that some necessary packages have not yet been created or moved
from "Incoming".
The following information may help to resolve the situation:

The following packages have dependencies that cannot be satisfied:
 rose-melodic-desktop-full: Dependent on: rose-melodic-desktop but it will not be installed
                            Depending on: rose-melodic-perception but it will not be installed
                            Depending on: rose-melodic-simulators but it will not be installed
                            Depending on: ros-melodic-urdf-sim-tutorial but it will not be installed
E: Could not correct the problems, you have withheld broken packages.

Please help me install ROS

Cindy Meister
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plsHelp
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  • This was the answer for me: Use [aptitude](https://stackoverflow.com/questions/45335914/ros-installation-error-ros-kinetic-in-ubuntu-16-04/58581261#58581261) – Don Slowik Oct 27 '19 at 18:56

4 Answers4

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first of all install program on ubuntu.

sudo apt-get update

sudo apt-get upgrade

after update packet try follow the instructions at: enter link description here again

Peyman Mohamadpour
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superup
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  • Try this : sudo apt autoclean, sudo apt-get clean, sudo apt autoremove – superup Sep 21 '19 at 16:26
  • Hi, Thank you for the tip, something atleast happend with the commands you prupose. But im stil stuck at the same error after : sudo apt-get install ros-melodic-desktop-full – plsHelp Sep 21 '19 at 19:11
  • Hi, I understand that is something is wrong in packet unused in ubuntu make error. – superup Sep 22 '19 at 15:21
  • Yes but i cannot clear ros package and re download it, only gives same error. Shiuld i add dependices seperatly, if so how? – plsHelp Sep 23 '19 at 21:10
  • If you post an answer, please add **all** relevant information to the answer itself – Nico Haase May 07 '20 at 05:34
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1 - After following ROS melodic Installation first steps (see link below), Try to install it with the link "click here" below the "sudo apt install ros-melodic-desktop-full" line

ROS melodic Installation page

If it's doesn't work

2 - check, "Software & Update" parameters (if you cannot find it: launch "Ubuntu Software Center" and in the menu bar, on top, select "Software & Update") In "Other Sofware" tab, the link

"http://pacckage.ros.org/ros/ubuntu bionic main"

is printed, and in "Autentication" tab a key from Open Robotics is printed

3 - Try to do 1- again, if it doesn't work, follow 4-

4 - In "Updates" tab, check "recommanded Updates", launch "Update Manager" and install updates (I don't do it properly on my PC)

5 - And finally you need to install manually rosdep with: "sudo apt-get install python-rosdep"

verdewer
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Ubuntu (apt) does NOT allow packages with the same name but different versions to be installed.

Remove other versions first. For example: apt remove ros-desktop*

SleepyProgrammer
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I got it working like so:

  1. Install deps:

    sudo apt install gazebo9-common libgazebo9-dev gazebo9 ros-melodic-gazebo-ros-pkgs ros-melodic-gazebo-dev ros-melodic-gazebo-ros-control ros-melodic-gazebo-ros ros-melodic-urdf-sim-tutorial ros-melodic-simulators

  2. Install ros melodic

    sudo apt-get install ros-melodic-desktop-full

Chris
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