instalando o ns2 no ubuntu

Question

quando eu dou este comando

apt-get install build-essential autoconf automake libxmu-dev

dá o seguinte erro

E: Package 'build-essential' has no installation candidate
E: Package 'autoconf' has no installation candidate
E: Package 'automake' has no installation candidate
E: Unable to locate package libxmu-dev

    

Answer 1

Tente primeiro ativar o repositório principal:

sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) main"
sudo apt-get update

E finalmente:

sudo apt-get install build-essential autoconf automake libxmu-dev