sudo -ienter password mes@!@## sudo apt-get update
# sudo apt-get install autoconf
# sudo apt-get install libc6-dev g++ gcc
# sudo apt-get install build-essential
# sudo apt-get install libx11-dev
# sudo apt-get install x-dev
# sudo apt-get install xorg-dev
# sudo apt-get install xgraph
# sudo apt-get install gnuplot

//remove root//

logoutlscd Documents(folder cpy+past document)cd sach(filename)lstar -xvf file name (ns-allinone-2.35.tar.gz)ls

export PATH=$PATH:/Engg/Documents/r/ns-allinone-2.35/bin:/Engg/Documents/r/ns-allinone-2.35/tcl8.5.10/unix/:/Engg/Documents/r/ns-allinone-2.35/tk8.5.10/unix/
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/Engg/Documents/r/ns-allinone-2.35/otcl-1.14/:/Engg/Documents/r/ns-allinone-2.35/lib
export TCL_LIBRARY=/Engg/Documents/r/ns-allinone-2.35/tcl8.5.10/library/:/Engg/Documents/r/ns-allinone-2.35/tk8.5.10/library/
export NS=/Engg/Documents/r/ns-allinone-2.35/ns-2.35
export NSVER=2.35

gedit ~/.bashrc

///nsctrl zcd Desktopns (ns ns-simple.tcl)see op

# wget http://nile.wpi.edu/NS/Example/ns-simple.tcl
# ns ns-simple.tcl