SASANK@TECHNOMANIA

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
or
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...)

Common errors

While installing ns2, sometimes we get errors some of them are mentioned below (as keywords used to search). Apart from these errors there are many other types of errors also which occurs.

• tcl8.4.18 make failed! exiting…
  
• tk8.4.18 make failed!
  
• make: *** [tk3d.o] error 1 tk8.4.18 make
  
• tk8.4.18 make fail
  

Here are some steps and precautions to install ns2 in one shot.

1. Always install your linux distro with full programming support, this will help you to install ns2 more easily, here programming support means support for perl, tcl, gcc etc.
2. Also install this packages

   install autoconf

   install automake

   install gcc-c++

   install libX11-devel

   install xorg-x11-proto-devel

   install libXt-devel

   install libXmu-devel

Now try installing ns2, hope it should get install properly

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)

or
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

Do not want to use troublesome linux commands on putty for simple file transfers from a windows to linux machine...
Then Winscp is the solution

WinSCP is an open source free SFTP client and FTP client for Windows. Legacy SCP protocol is also supported. Its main function is safe copying of files between a local and a remote computer.


Download Winscp here

Many of you must have noticed that root login in ubuntu is disabled in default. Even su doesnt work. The ubuntu documentation says that “ubuntu is shipped with root account is locked“. Actually its a good move. The newcomers to ubuntu do not want to get frightened hearing the name ‘root‘. If you have moved passed the n00b stage you might want to unlock it.
Firstly you should set the root password. Login to ubuntu with the user which you created during installation. Go to System> Administration> Users and Groups. Select root. Click on Properties. Set the root password.
Secondly enable the root login. Click on System> Administration> Login Window. Click on Security tab. Check “Allow local administrator login“. Click on OK.
Everything is done. Now logout and log in with your root account.

A Word of CAUTION: Use your root account only when absolutely necessary. Never user root account for daily works. For regular work use the account created at installation time.
Reason: Root is the superuser. It has got all the unrestricted privileges to perform any tasks. Its like “I can do anything“.
While running as normal user you would be prompted for your password when you try to make a major change to system settings. Thus you would be alerted that your step is making some changes if you are ignorant of the step you are taking.
A virus is a program or script that intends to harm your system by changing the settings or configuration. At that stage you would be prompted for password, thus you can get warned.