Installing NS2 under Ubuntu 9.10

1. Download NS2 from the following Website, I tried version ns-allinone-2.34.tar.gz.
2. Put the file under /home/pradeep/ (my user login is pradeep, you may try with your username)
3. go the folder in the shell prompt by issuing the following command cd /home/pradeep/
4. Since installation of NS2 simulator needs some autoconfigurationfiles which will need to be installed. To download those packages, justexecute the following commands $ sudo apt-get install build-essentialautoconf automake libxmu-dev
5. it will take some time to download and install.
6. Now execute the following steps so that NS2 will be installed $ tarzxvf ns-allinone-2.34.tar.gz $ cd ns-allinone-2.34 $ ./install
7. You may get an error like libotcl.o error, to correct that execute, sudo apt-get install g++-4.3, once done, open the file otcl-1.13/Makefile.in, in line number 7 change 
8. CC= @CC@ to CC= gcc-4.3, then again goto step 6
   
9. After the above steps, NS2 will give the path information which needs to be set in the PATH variable
10. Open the file .bashrc which is available under the folder/home/pradeep/ (if you try to install in root user /root/.bashrc). Usethe following command to open the .bashrc file $ gedit/home/pradeep/.bashrc
11. edit the above file and set the following paths over there exportPATH=$PATH:/home/pradeep/ns-allinone-2.34/bin:/home/pradeep/ns-allinone-2.34/tcl8.4.18/unix:/home/pradeep/ns-allinone-2.34/tk8.4.18/unixexport LD_LIBRARY_PATH= /home/pradeep/ns-allinone-2.34/otcl-1.13,/home/pradeep/ns-allinone-2.34/lib
12. Thats it!!! save the file, logout and login with the username.
13. open the shell prompt and type $ ns (you will get a % indicatingthat the installation is working correctly) $ nam ( a window will beopened showing the network animator)