去年学习了2.34的安装方法，，后来换了Ubuntu 11.10后重新安装发现NS升级到2.35，官方手册还是使用11年04月的那份。我个人建议学习英文版的手册，因为版本新，里面有一些新添加的东西。中文汉化的手册版本都比较旧，基本都是08年以前的。当然这个因人而异了，中文版看着容易一些而且做了美工，英文版原汁原味。萝卜白菜，各有所爱。那么现在就来说说最新2.35的安装方法。我们发现2.34安装时要修复不少小问题，可喜的是2.35里面都得到了修正，所以安装起来要容易得多，下面说说具体的步骤吧。
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Ubuntu 11.04下安装ns-allinone-2.34.tar.gz 1.安装必备包，和2.34一样sudo apt-get install build-essentialsudo apt-get install tcl8.4 tcl8.4-dev tk8.4 tk8.4-devsudo apt-get install libxmu-dev libxmu-headerssudo apt-get install xorg-dev g++ xgraphsudo apt-get install g++-4.42.将下载好的tar包放到自己想要放置的位置，然后在Terminal进入ns-allinone-2.35文件夹下直接安装sudo ./install3.漫长的等待后会出现类似Please put /usr/local/ns2/ns-allinone-2.34/bin:/usr/local/ns2/ns-allinone-2.34/tcl8.4.18/unix:/usr/local/ns2/ns-allinone-2.34/tk8.4.18/unixinto your PATH environment; so that you’ll be able to run itm/tclsh/wish/xgraph.
IMPORTANT NOTICES:
(1) You MUST put /usr/local/ns2/ns-allinone-2.34/otcl-1.13, /usr/local/ns2/ns-allinone-2.34/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 /usr/local/ns2/ns-allinone-2.34/tcl8.4.18/library into your TCL_LIBRARY environmental variable. Otherwise ns/nam will complain during startup.
After these steps, you can now run the ns validation suite withcd ns-2.34; ./validate
root@:/usr/local/ns2/ns-allinone-2.34#表明你安装成功了。这时只需更改几个参数：先输入gedit ~/.bashrc之后在文本的最后添加export PATH=”$PATH:/usr/local/ns2/ns-allinone-2.35/bin:/usr/local/ns2/ns-allinone-2.35/tcl8.5.10/unix:/usr/local/ns2/ns-allinone-2.35/tk8.5.10/unix”export LD_LIBRARY_PATH=”/usr/local/ns2/ns-allinone-2.35/otcl-1.14:/usr/local/ns2/ns-allinone-2.35/lib”export TCL_LIBRARY=”$TCL_LIBRARY:usr/local/ns2/ns-allinone-2.35/tcl8.5.10/library”红字部分是相对路径，请更改为自己安装的路径。之后在Terminal输入ns，显示%就表示运行成功了。可以编辑一个test.tcl文件，里面输入手册一开始提到的例子：# The preambleset ns [new Simulator];# initialise the simulation# Predefine tracingset f [open out.tr w]$ns trace-all $fset nf [open out.nam w]$ns namtrace-all $nfset n0 [$ns node]set n1 [$ns node]set n2 [$ns node]set n3 [$ns node]$ns duplex-link $n0 $n2 5Mb 2ms DropTail$ns duplex-link $n1 $n2 5Mb 2ms DropTail$ns duplex-link $n2 $n3 1.5Mb 10ms DropTail# Some agents.set udp0 [new Agent/UDP]$ns attach-agent $n0 $udp0set cbr0 [new Application/Traffic/CBR]$cbr0 attach-agent $udp0$udp0 set class_ 0;# A UDP agent;# on node $n0;# A CBR traffic generator agent;# attached to the UDP agent;# actually, the default, but. . .;# Its sink;# on node $n3set null0 [new Agent/Null]$ns attach-agent $n3 $null0$ns connect $udp0 $null0$ns at 1.0 “$cbr0 start”puts [$cbr0 set packetSize_]puts [$cbr0 set interval_]# A FTP over TCP/Tahoe from $n1 to $n3, flowid 2set tcp [new Agent/TCP]$tcp set class_ 1$ns attach-agent $n1 $tcpset sink [new Agent/TCPSink]$ns attach-agent $n3 $sink;# TCP does not generate its own trafficset ftp [new Application/FTP]$ftp attach-agent $tcp$ns at 1.2 “$ftp start”$ns connect $tcp $sink$ns at 1.35 “$ns detach-agent $n0 $tcp ; $ns detach-agent $n3 $sink”# The simulation runs for 3s.# The simulation comes to an end when the scheduler invokes the finish{} procedure below.# This procedure closes all trace files, and invokes nam visualization on one of the trace files.$ns at 3.0 “finish”proc finish {} {global ns f nf$ns flush-traceclose $fclose $nfputs “running nam…”exec nam out.nam &exit 0}# Finally, start the simulation.$ns run保存之后，Terminal进入文件所在文件夹，运行ns test.tcl，如果成功会打开nam显示模拟情况。最后，补充一个有用的软件gnuplot，画图利器。sudo apt-get install gnuplot
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