就是mkdir /home/share，然后把ns-allinone-2.33都放进去，然后path直接用以下设置，在/home下修改.bashrc（ps:这个改的安全点，etc下面的也行，不过改多了会乱）
改这个vi /home/www.linuxidc.cm /.bashrc
在末尾添加如下，保存就行了
# NS 2.33 config
export PATH="$PATH:/home/share/ns-allinone-2.33/bin:/home/share/ns-allinone-2.33/tcl8.4.18/unix:/home/share/ns-allinone-2.33/tk8.4.18/unix"
export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/home/share/ns-allinone-2.33/otcl-1.13:/home/share/ns-allinone-2.33/lib"
export TCL_LIBRARY="$TCL_LIBRARY:/home/share/ns-allinone-2.33/tcl8.4.18/library"
不是这个目录的可以对应下面，应该能明白怎么修改的吧
Please put /home/share/ns-allinone-2.33/bin:/home/share/ns-allinone-2.33/tcl8.4.18/unix:/home/share/ns-allinone-2.33/tk8.4.18/unix
into your PATH environment; so that you'll be able to run itm/tclsh/wish/xgraph.
对应修改Path
You MUST put /home/share/ns-allinone-2.33/otcl-1.13, /home/share/ns-allinone-2.33/lib,
into your LD_LIBRARY_PATH environment variable.
对应修改LD_LIBRARY
You MUST put /home/share/ns-allinone-2.33/tcl8.4.18/library into your TCL_LIBRARY environmental
variable. Otherwise ns/nam will complain during startup.
对应修改TCL_LIBRARY
现在可以大致测试下了，ns-allinone-2.33/ns-2.33目录下运行
[root@localhost ns-2.33]# ./validate
不会出现could not found就是ok了
然后测试nam，
[root@localhost ns-2.33]# nam
会出现个图形的框子就是可以的了，这样ns2就基本配置好了