da, nije bas "obican" problem i nadam se da nisam fulao sto sam ovdje postao. uglavnom uspio sam rijesiti problem i evo ako se netko bude jednog dana bavio sa ns2 i imao ovakav problem da zna sto treba napraviti.
1. napraviti update ubuntu-a
2. sudo apt-get install libx11-dev kdebase-dev
3. instalirati ns2 (ja sam radio sa ns-allinone-2.34)
4. u bashrc staviti
# LD_LIBRARY_PATH
OTCL_LIB=/your/path/ns-allinone-2.32/otcl-1.13
NS2_LIB=/your/path/ns-allinone-2.32/lib
X11_LIB=/usr/X11R6/lib
USR_LOCAL_LIB=/usr/local/lib
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$OTCL_LIB:$NS2_LIB:$X11_LIB:$USR_LOCAL_LIB
# TCL_LIBRARY
TCL_LIB=/your/path/ns-allinone-2.32/tcl8.4.15/library
USR_LIB=/usr/lib
export TCL_LIBRARY=$TCL_LIB:$USR_LIB
# PATH
XGRAPH=/your/path/ns-allinone-2.32/bin:/your/path/ns-allinone-2.32/tcl8.4.15/unix:/your/path/ns-allinone-2.32/tk8.4.14/unix
NS=/your/path/ns-allinone-2.32/ns-2.32/
NAM=/your/path/ns-allinone-2.32/nam-1.13/
PATH=$PATH:$XGRAPH:$NS:$NAM
i to je to :-).