Error: Failed to get the current user's information: Login failed: Cannot run program "whoami":

[v k]

Hello:

I am using the latest svn trunk of nutch. The build was successful but
when I run bin/nutch command I get the error:

Injector: starting
Injector: crawlDb: crawl/crawldb
Injector: urlDir: urls
Injector: Converting injected urls to crawl db entries.
Exception in thread "main" java.io.IOException: Failed to get the
current user's information: Login failed: Cannot run program "whoami":
error=2, No such file or directory
        at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:466)
        at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:805)
        at org.apache.nutch.crawl.Injector.inject(Injector.java:157)
        at org.apache.nutch.crawl.Crawl.main(Crawl.java:113)

Did this happen to anyone else?

Thanks,
VK