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Installation Instructions for Network Simulator 2

The ns2 version taken here is 2.31, if you downloaded any other version, please modify your version during installation

1)Uncompress the ns2

tar zxvf ns-allinone-2.31.tar.gz
gzip -d ns-allinone-2.31.tar.gz
tar xvf ns-allinone-2.31.tar

2) cd /opt/ns-allinone-2.31 (since /opt is the folder which is unused, so i have selected that folder to install, however you can install that in any folder)

3) ./install (execute the command)

4) If the installation fails in the middle, then try to install the linux packages that are

necessary to run NS2. (In any linux (ubuntu or fedora or redhat or suse), install the TCL/TK, Perl packages during the installation of linux...)

5) Once the installation succeeded, then the path information will be provided by the NS2

6) Set the path in the /root/.bash_profile
(vi /root/.bash_profile)

If you are a user home//.bash_profile (for example, if your the username is tsp, then execute this command vi /home/tsp/.bash_profile)
7) set the PATH and the LD_LIBRARY_PATH according to the point number 11.

8) logout and login.

9) go to the terminal and try ns or nam

10) for running the examples comes along with the distribution of NS2
cd /opt/ns-allinone-2.31/ns-2.31/tcl/ex

11. This is how you will see once the ns2 installation is success, from this information, you can put the PATH and LD_LIBRARY_PATH variable..

////////////////This is the successful installation of the NS2 package

Ns-allinone package has been installed successfully.
Here are the installation places:
tcl8.4.14: /opt/ns-allinone-2.31/{bin,include,lib}
tk8.4.14: /opt/ns-allinone-2.31/{bin,include,lib}
otcl: /opt/ns-allinone-2.31/otcl-1.13
tclcl: /opt/ns-allinone-2.31/tclcl-1.19
ns: /opt/ns-allinone-2.31/ns-2.31/ns
nam: /opt/ns-allinone-2.31/nam-1.13/nam
xgraph: /opt/ns-allinone-2.31/xgraph-12.1
gt-itm: /opt/ns-allinone-2.31/itm, edriver, sgb2alt, sgb2ns, sgb2comns, sgb2hierns


Please put /opt/ns-allinone-2.31/bin:/opt/ns-allinone-2.31/tcl8.4.14/unix:/opt/ns-allinone-2.31/tk8.4.14/unix
into your PATH environment; so that you'll be able to run itm/tclsh/wish/xgraph.


(1) You MUST put /opt/ns-allinone-2.31/otcl-1.13, /opt/ns-allinone-2.31/lib,
into your LD_LIBRARY_PATH environment variable.

If it complains about X libraries, add path to your X libraries
If you are using csh, you can set it like:
If you are using sh, you can set it like:

(2) You MUST put /opt/ns-allinone-2.31/tcl8.4.14/library into your TCL_LIBRARY environmental

variable. Otherwise ns/nam will complain during startup.

After these steps, you can now run the ns validation suite with
cd ns-2.31; ./validate

For trouble shooting, please first read ns problems page Also search the ns mailing list archive
for related posts.


  1. [...] 8: then go for the Installing the Network Simulator 2click here to see the installation instructions This entry was posted in Fedora, NAM, NS2. Bookmark the permalink. ← How to recompile NS2 [...]

  2. hii
    i downloaded the cygwin tool and installed in windows 7
    now i installed ns2 30 version in cygwin in windows 7 and succesfully installed
    then what i have to do further to work in ns2 plz reply me
    waitng for u r reply

  3. hi sir,
    i am installing ns2.34 in fedora14 but i got the following error
    /home/amma/Desktop/ns-allinone-2.34/tk8.4.18/unix/../generic/tk.h:81:23: fatal error: X11/Xlib.h: No such file or directory
    compilation terminated.
    make: *** [tk3d.o] Error1
    tk8.4.18 make failed! Exiting ...
    plz help me out from this......
    i need your help,waiting for your reply.......
    thanks in advance....

  4. hello,
    thank you for your instruction

    but send full step because some steps are not understand

  5. hello sir..
    i want to install ns2.29.3 on ubuntu 10.10..
    please give me stepwise procedure for the same..

  6. Hi All
    i'm study master,now i work in ad hoc network.
    I have proplem with ns Xgraph, when i do graph event error this error said that the not find path or diractor
    plz,help me, what i can do?
    i be very thankfull for that

  7. Hello All!
    I am getting problem when running ns2 program,especially in nam file and trace file. I am using fedora 14 and ns2.34.
    please help me.
    thanks with regards.


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