Error -bash: ns: command not found
first I want to say that I googled it many times and still it does not work! what I did is like this:

    nano ~/.bash_profile
    //then add these below lines to the end
    export PATH=$PATH:/home/ns-allinone-2.34/bin:/home/ns-             
    allinone2.34/tcl8.4.18/unix:/home/ns-allinone-2.34/tk8.4.18/unix
    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/ns-allinone-2.34/otcl-1.13:
    /home/ns-allinone-2.34/lib
    export TCL_LIBRARY=$TCL_LIBRARY:/home/ns-allinone-2.34/tcl8.4.18/library
    //then save and type this
    source ~/.bash_profile
but when I want to use ns command I will get this error! 
`-bash: ns: command not found`please tell me what is wrong with it
Error -bash: ns: command not found
===

first I want to say that I googled it many times and still it does not work! what I did is like this:

    nano ~/.bash_profile
    //then add these below lines to the end
    export PATH=$PATH:/home/ns-allinone-2.34/bin:/home/ns-             
    allinone2.34/tcl8.4.18/unix:/home/ns-allinone-2.34/tk8.4.18/unix
    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/ns-allinone-2.34/otcl-1.13:
    /home/ns-allinone-2.34/lib
    export TCL_LIBRARY=$TCL_LIBRARY:/home/ns-allinone-2.34/tcl8.4.18/library
    //then save and type this
    source ~/.bash_profile
but when I want to use ns command I will get this error! 
`-bash: ns: command not found`please tell me what is wrong with it