I'm not an expert in linux and just a beginner in ROS. I need to install this version of ros : ROS 2 Foxy Fitzroy (https://docs.ros.org/en/foxy/Installation.html)
On my linux computer :
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal
And I'm having some issues with the command : sudo apt install ros-foxy-desktop
Giving me this error :
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
ros-foxy-desktop : Depends: ros-foxy-action-tutorials-cpp but it is not going to be installed
Depends: ros-foxy-action-tutorials-interfaces but it is not going to be installed
Depends: ros-foxy-action-tutorials-py but it is not going to be installed
Depends: ros-foxy-composition but it is not going to be installed
Depends: ros-foxy-demo-nodes-cpp but it is not going to be installed
Depends: ros-foxy-demo-nodes-cpp-native but it is not going to be
Depends: ros-foxy-examples-rclcpp-minimal-client but it is not going to be installed
Depends: ros-foxy-examples-rclcpp-minimal-composition but it is not going to be installed
Depends: ros-foxy-examples-rclcpp-minimal-publisher but it is not going to be installed
Depends: ros-foxy-examples-rclcpp-minimal-service but it is not going to be installed
Depends: ros-foxy-examples-rclcpp-minimal-subscriber but it is not going to be installed
Depends: ros-foxy-examples-rclcpp-minimal-timer but it is not going to be installed
Depends: ros-foxy-tlsf-cpp but it is not going to be installed
Depends: ros-foxy-topic-monitor but it is not going to be installed
Depends: ros-foxy-turtlesim but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
I've been trying for 2 days to find a fix with no clues.
Here are some commands I tried with their results:
sudo apt-get update --fix-missing && sudo apt-get upgrade && sudo apt-get dist-upgrade
Hit:1 http://archive.canonical.com/ubuntu bionic InRelease
Hit:2 http://archive.ubuntu.com/ubuntu bionic InRelease
Get:3 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Hit:4 http://ppa.launchpad.net/git-core/ppa/ubuntu focal InRelease
Hit:5 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:6 http://packages.microsoft.com/repos/code stable InRelease
Get:7 http://archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Get:8 http://archive.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Hit:9 http://archive.ubuntu.com/ubuntu focal InRelease
Ign:10 http://linux.dropbox.com/ubuntu disco InRelease
Hit:11 http://linux.dropbox.com/ubuntu disco Release
Hit:12 http://packages.ros.org/ros2/ubuntu focal InRelease
Fetched 252 kB in 3s (89.0 kB/s)
Reading package lists... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
sudo dpkg --configure -a
shows nothing
dpkg --get-selections | grep hold
shows nothing
If you have any suggestion I would gladly try it.
Thank you for anyone who took the time to read my message !
