[ns] after installing ns2.1b8

[Nipul Jayvant Shah <njshah@unity.ncsu.edu>]

Hi! I am a first time ns user and recently installed the allinone version
of ns2.1b8. after the installation i got the following message:

------------------------------------------------------------------------
Please put
/ncsu/mmtech/incoming/njshah/ns-allinone-2.1b8/bin:/ncsu/mmtech/incoming/njshah/ns-allinone-2.1b8/tcl8.3.2/unix:/ncsu/mmtech/incoming/njshah/ns-allinone-2.1b8/tk8.3.2/unix
into your PATH environment; so that you'll be able to run
itm/tclsh/wish/xgraph.

IMPORTANT NOTICES:

(1) You MUST put
/ncsu/mmtech/incoming/njshah/ns-allinone-2.1b8/otcl-1.0a7,
/ncsu/mmtech/incoming/njshah/ns-allinone-2.1b8/lib,
    into your LD_LIBRARY_PATH environment variable.
    If it complains about X libraries, add path to your X libraries
    into LD_LIBRARY_PATH.
    If you are using csh, you can set it like:
                setenv LD_LIBRARY_PATH <paths>
    If you are using sh, you can set it like:
                export LD_LIBRARY_PATH=<paths>

(2) You MUST put
/ncsu/mmtech/incoming/njshah/ns-allinone-2.1b8/tcl8.3.2/library into your
TCL_LIBRARY environmental
    variable. Otherwise ns/nam will complain during startup.
---------------------------------------------------------------------------

Could someone please elaborate on this? This may seem trivial, but any
help will really be appreciated.

Thanks.

njs