I am new to Linux. I am trying to develop ROS application using eclipse. I don't understand the below which is provided in ROS website. Can you explain this in more simple way, So that I can configure my eclipse after downloading from eclipse.org.
Reusing your shell's environment
For building and running ROS programs from inside IDEs, the ROS enviroment has to be set up. All IDEs might have a config for that, but running your IDE from your ROS-sourced shell should be the easiest way, avoiding inconsistency.
Likewise, you can enhance your IDE's launcher icon to load your shells environment. E.g., replace its command eclipse with
bash -i -c "eclipse"
. This will make bash source~/.bashrc
, in which ROS has to be sourced and parameterized, and start that IDE.