Maybe you could provide more information on why you can't install it? Do you get any additional error messages or just the one in the title?? It is released so this shouldn't be the issue...

Maybe run apt get update?

sudo apt-get install ros-noetic-mavros Reading package lists... Done Building dependency tree
Reading state information... Done E: Unable to locate package ros-noetic-mavros

Thats what i get, i also did apt get update but same error

Also if i try to do catking build i get this error

Traceback (most recent call last): File "/usr/bin/catkin", line 6, in from pkg_resources import load_entry_point File "/usr/lib/python3/dist-packages/pkg_resources/init.py", line 3254, in def initialize_master_working_set(): File "/usr/lib/python3/dist-packages/pkg_resources/init.py", line 3237, in _call_aside f(*args, **kwargs) File "/usr/lib/python3/dist-packages/pkg_resources/init.py", line 3266, in _initialize_master_working_set working_set = WorkingSet._build_master() File "/usr/lib/python3/dist-packages/pkg_resources/init.py", line 584, in _build_master ws.require(requires_) File "/usr/lib/python3/dist-packages/pkg_resourc

Please source your ROS environment, then provide the output of the following lines:

env | grep ROS
cat /etc/apt/sources.list.d/ros-latest.list

I'm having the same issue. Was there a solution for this?

Can you answer the questions in the comments posted above?