java - 编译hadoop 1.0.3字数代码

Question

ayush@ayush-PC:/usr/local/hadoop$ bin/hadoop jar /home/ayush/Desktop/Hadoop-     WordCount/wordcount.jar Wordcount input output
Exception in thread "main" java.io.IOException: Permission denied
    at java.io.UnixFileSystem.createFileExclusively(Native Method)
    at java.io.File.createTempFile(File.java:1879)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:115)

我收到这个错误。我正在使用 jdk1.7 和 Hadoop1.0.3

谁能告诉如何摆脱这个错误