接着上篇blog，继续看log里面的信息如下：
+ echo 'Training Naive Bayes model'
Training Naive Bayes model
+ ./bin/mahout trainnb -i /home/mahout/mahout-work-mahout/20news-train-vectors -el -o /home/mahout/mahout-work-mahout/model -li /home/mahout/mahout-work-mahout/labelindex -ow
+ echo 'Training N
