I have installed the default packages & gcc, gcc-objc, gcc-g++, make,patch,xorg-x11-base, xorg-x11-devel packages,i.e. the packages required for ns2.Tclscripts can't be compiled,morover,uptil now(because i have just tried very simple & small programes) "puts" command is not working.It is saying- command not found.I have installed cygwin in c drive.I am opening the prompt from desktop shortkut & entering the directory by-
$ cd c:
$ cd cygwin
$ set a "5"
$ puts a
bash: puts: command not found

I hav not installed ns2,tcl/tk yet.Can any1 please help me???????It's urgent for my project........

Thanks in advance..........

You are using bash, not tcl. puts is not a bash command. You should use echo, or printf.
Now the best thing to do is to calm down, look at the problem and write a detailed post of what you want to achieve and how you want to do it, in a way that people can understand. Use complete words and sentences. What is your problem exactly, what did you expect and what did you get?

So, it looks like it was not that urgent after all...