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Step 3: Building the Dependencies
Package autoconf is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Unable to locate package build-essential
E: Package 'autoconf' has no installation candidate
E: Unable to locate package automake
E: Unable to locate package libxmu-de
Source: https://www.howtoforge.com/tutorial/ns2-network-simulator-on-ubuntu-14.04/
The ns2 build prerequisites :
sudo apt-get update && sudo apt-get install g++ autoconf make libtool libxmu-dev
## Older Ubuntu's : libtool-bin
( build-essential will install g++, make. Easier to type just g++ make )
Also useful : sudo apt-get install xgraph
cat /etc/apt/sources.list– A.B. Feb 19 '16 at 10:28