Problem with the command line : (chown -R user:theconstruct rviz_config/)

hello, i’m trying to setup some elements in order to configure the GPS in my autonomous vehicle,

but im facing a problem with the command line : (chown -R user:theconstruct rviz_config/)
i got the error msg : (chown: invalid group: ‘user:theconstruct’)

if someone can help that would much appreciated .

You have to create your own groups, you dont have ths thecnstruct group in your local pc. You could use ROSDevelopementStudio for this if you dont need to have it locally and there you have that group.