Ns2 Installation steps in ubuntu 12.04 / 13.10 / 14.04 (package NS2.35)

1. Firstly download the tar file of ns2.35  NS2 package (ns-allinone-2.35)

2. Copy that tar file in home path

3. Open terminal by ctrl+t

4. Type command on that is... sudo apt-get update

5. Then password your system...

6.  Then type coomand... sudo apt-get install build-essential autoconf automake   libxmu-dev.

7.Then type that command for extract the tar file... tar zxvf ns-allinone-2.35.tar.gz other wise you extract manually its your choice.

8.Then type on terminal .....cd ns-allinone-2.35

9.Then type the command ... gedit ns-2.35/linkstate/ls.h
      (for changing the line 137...) is it
       void eraseAll() { erase(baseMap::begin(), baseMap::end()); }

its change by....that line
  void eraseAll() { this->erase(baseMap::begin(), baseMap::end()); }

then paste that line on that program file linkstate -> manually also do that

10. Then type the command ./install on terminal.

11. After installation the ns2.35 then you will copy the path on the terminal
     is....
Copy the PATH and LD_LIBRARY_PATH information in to your variable, you may use the /home/usr/.bashrc file and copy and paste the PATH and LD_LIBRARY_PATH.
Here you use command on another terminal is

vikasbro@ubuntu:~$ gedit ~/.bashrc

  and post the following text into your bashrc file

# LD_LIBRARY_PATH

OTCLLIB=/path/to/ns-allinone-2.35/otcl-1.14

NS2=/path/to/ns-allinone-2.35/lib

USR_LocalLIB=/usr/local/lib

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$OTCLLIB:$NS2:$USR_LocalLIB

# TCL_LIBRARY

TCLIB=/path/to/ns-allinone-2.35/tk8.5.10/library

USRLIB=/usr/lib

export TCL_LIBRARY=$TCLIB:$USRLIB

# PATH

XGRAPH=/path/to/ns-allinone-2.35/xgraph-12.2/:/path/to/ns-allinone-2.35/bin:/path/to/ns-allinone-2.35/tcl8.5.10/unix:/path/to/ns-allinone-2.35/tk8.5.10/unix

NS=/path/to/ns-allinone-2.35/ns-2.35

NAM=/path/to/ns-allinone-2.35/nam-1.15

export PATH=$PATH:$XGRAPH:$NS:$NAM

and replace your path.. just like that
# LD_LIBRARY_PATH
OTCLLIB=/home/vikasbro/ns-allinone-2.35/otcl-1.14
NS2=/home/vikasbro/ns-allinone-2.35/lib
USR_LocalLIB=/usr/local/lib
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$OTCLLIB:$NS2:$USR_LocalLIB

# TCL_LIBRARY
TCLIB=/home/vikasbro/ns-allinone-2.35/tcl8.5.10/library
USRLIB=/usr/lib
export TCL_LIBRARY=$TCLIB:$USRLIB

# PATH
XGRAPH=/home/vikasbro/ns-allinone-2.35/xgraph-12.2/:/home/vikasbro/ns-allinone-2.35/bin:/home/vikasbro/ns-allinone-2.35/tcl8.5.10/unix:/home/vikasbro/ns-allinone-2.35/tk8.5.10/unix
NS=/home/vikasbro/ns-allinone-2.35/ns-2.35
NAM=/home/vikasbro/ns-allinone-2.35/nam-1.15
export PATH=$PATH:$XGRAPH:$NS:$NAM   

12. After copy and paste  then you type on terminal is ns if a% is show on terminal the ns2    is successfully install if not then problem is occurred so follow above steps carefully otherwise contact me...

13. Then Type on terminal nam the pop up window will be open for nam animator.
 After installation plz comment or not install or error then ask ......