@Takwa Sahmim , Hi .
Be aware that <standard answering time> is ~18... 48 hours.
About ``java´´ : Install java7jdk for your OS.
http://linuxsilo.net/docs/smart-questions_en.html... I.e. if you want answers, some information is required :
OS name, version, <arch>= i686? or x86_64? ???
*** When you have answered , I can advise a java package for your OS.
BonnMotion : Please use this location → /home/<user-name>///bonnmotion-2.1a/
... for easier use : "root" is for administrative tasks only.
All ns2 , etc. : Don't use root . ( Except for commands like # make install ).
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