[solved] UWsim installscene.sh command not found

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Hi, I just start with ROS and UWsim

I am trying to install new scenes because i want to modified a scene for my project.

I follow the guide on this answer

http://answers.ros.org/question/23483...

I download the sh file from this link

http://www.irs.uji.es/uwsim/files/sce...

then

copy and paste the file into the path

/opt/ros/indigo/share/uwsim/data/scenes

Then I try to run the line:

sudo /opt/ros/indigo/share/uwsim/data/scenes/installScene.sh -s pipes_scene.uws

and I get:

root@wilmer-VirtualBox:~# sudo /opt/ros/indigo/share/uwsim/data/scenes/installScene.sh -s pipes_scene.uws sudo: /opt/ros/indigo/share/uwsim/data/scenes/installScene.sh: command not found

what am I doing wrong?