Install and configure Eclipse IDE to use with ns3 on Ubuntu
First, you need to download Eclipse CDT (C/C++ Development Tooling): sudo apt-get install eclipse-cdt eclipse-mercurialeclipse Maybe, you will have problems to run eclispse and it will close: An extract of the log: org.osgi.framework.BundleException: The bundle "org.eclipse.equinox.simpleconfigurator_1.0.301.dist [1]" could not be resolved. Reason: Missing Constraint: Bundle-RequiredExecutionEnvironment: CDC-1.1/Foundation-1.1,J2SE-1.4 !MESSAGE Bundle initial@reference:file:plugins/org.eclipse.equinox.simpleconfigurator_1.0.301.dist.jar was not resolved. !MESSAGE Missing required capability Require-Capability: osgi.ee; filter="(|(&(osgi.ee=CDC/Foundation)(version=1.1))(&(osgi.ee=JavaSE)(version=1.4)))" To solve it, you must change your java version to other compatible with eclipse. In my case, I was using openjdk9, and I switch it for openjdk8-jre. sudo apt-get install openjdk-8-jre sudo update-alternatives --config java