I have a Xavier AGX based computer and I am trying to install ROS. I am getting the following error:
nvidia@nvidia-desktop:/dev$ sudo apt install ros-melodic-desktop-full
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-melodic-desktop-full : Depends: ros-melodic-desktop but it is not going to be installed
Depends: ros-melodic-perception but it is not going to be installed
Depends: ros-melodic-simulators but it is not going to be installed
Depends: ros-melodic-urdf-sim-tutorial but it is not going to be installed
nvidia@nvidia-desktop:~/installROSXavier$ cat /etc/apt/sources.list
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
# deb-src http://ports.ubuntu.com/ubuntu-ports/ bionic main restricted
## Major bug fix updates produced after the final release of the
## distribution.
# deb-src http://ports.ubuntu.com/ubuntu-ports/ bionic-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
# deb-src http://ports.ubuntu.com/ubuntu-ports/ bionic universe
# deb-src http://ports.ubuntu.com/ubuntu-ports/ bionic-updates universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
# deb-src http://ports.ubuntu.com/ubuntu-ports/ bionic multiverse
# deb-src http://ports.ubuntu.com/ubuntu-ports/ bionic-updates multiverse
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
# deb-src http://ports.ubuntu.com/ubuntu-ports/ bionic-backports main restricted universe multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu bionic partner
# deb-src http://archive.canonical.com/ubuntu bionic partner
# deb-src http://ports.ubuntu.com/ubuntu-ports/ bionic-security main restricted
# deb-src http://ports.ubuntu.com/ubuntu-ports/ bionic-security universe
# deb-src http://ports.ubuntu.com/ubuntu-ports/ bionic-security multiverse
deb http://ports.ubuntu.com/ubuntu-ports/ bionic universe restricted main multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports/ bionic universe restricted main multiverse #Added by software-properties
nvidia@nvidia-desktop:~/installROSXavier$
nvidia@nvidia-desktop:~/installROSXavier$
nvidia@nvidia-desktop:~/installROSXavier$ cat /etc/apt/sources/list.d/ros-latest.list
cat: /etc/apt/sources/list.d/ros-latest.list: No such file or directory
It looks like you may not have properly added the ROS apt sources. Can you try re-running steps 1.2, 1.3, and 1.4 from here: https://wiki.ros.org/Installation/Ubuntu
Still no luck. I added additional output about my system
nvidia@nvidia-desktop:~/installROSXavier$ sudo apt install ros-melodic-desktop-full
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-melodic-desktop-full : Depends: ros-melodic-desktop but it is not going to be installed
Depends: ros-melodic-perception but it is not going to be installed
Depends: ros-melodic-simulators but it is not going to be installed
Depends: ros-melodic-urdf-sim-tutorial but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
nvidia@nvidia-desktop:~/installROSXavier$ cat /proc/version
Linux version 4.9.140-tegra (nvidia@ubuntu) (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05) ) #99 SMP PREEMPT Tue Nov 3 18:38:58 PST 2020
nvidia@nvidia-desktop:~/installROSXavier$ cat /etc/os-release
NAME="Ubuntu"
VERSION="18.04.4 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 18.04.4 LTS"
VERSION_ID="18.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=bionic
UBUNTU_CODENAME=bionic
nvidia@nvidia-desktop:~/installROSXavier$
What error do you get if you try to individually install ros-melodic-desktop, ros-melodic-perception, or any other the other blocked dependencies? If you keep going down the chain of trying to manually install the missing dependencies you should eventually see what underlying package is causing the conflict.