ok, I'm very new to Linux, so my question is very stupid.

I just installed a program called AVS in my redhat 9. All I want to do is to be able to write AVS from anywhere, using the terminal, and the program AVS will run, without having to tell the path averytime i run.

I know this has something to do with .bashrc files, but I'm having trouble finding it out.

Thanks in advance.

yea, you can set up .bashrc to add the directory the AVS program is sitting in to you path. if the full pathname for AVS is /home/usr/somedir/AVS, add this line to you .bashrc

PATH=$PATH:/home/usr/somedir/AVS

you could export this, allowing the updated path to be seen by any subshells you spawn, the above line would then become

export PATH=$PATH:/home/usr/somedir/AVS

if you're new, this probably wont make any difference to you.

Thank you.

sirclif is correct, but I would like show you another way to do it.

You could create a soft link from your executable to /usr/bin/
/usr/bin should already be in your PATH.

This should do it:
ln -sfn /home/usr/foo /usr/bin/

of course, that is a better way, i don't know what i was thinking. thats what i do for all the programs that i write myself. if there is only one executable, this would be a better way to do it. if there were say, 10 different executables associated with the program, then you would want to add it to your path.

Well Iḿ a newbie as you can surely say... Iḿ trying to make an application called [ns-2] work
I wonder if I did the right thing, I created a directory called [Applications] in my HOME directory, extracted the tar right there in the Application folder and installed ns2 and then added the following lines to the very end of </etc/skel/.bashrc> file:

# Setting Environment Variables For ns2

PATH=$PATH:/home/sav/Applications ; export PATH
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib:/home/sav/Applications/ns-allinone-2.34/otcl-1.13:/home/sav/Applications/ns-allinone-2.34/lib ; export LD_LIBRARY_PATH
TCL_LIBRARY=$TCL_LIBRARY:/home/sav/Applications/ns-allinone-2.34/tcl8.4.18/library ; export TCL_LIBRARY

now, why doesnt it change the PATH Environment Variables permanently? and is it ok to add Applications folder to PATH instead of adding some subdirectories inside of Applications/ns2 to PATH Env. Var.?