I have created jar in folder /usr/local/bin/niidle.jar.
Manifest-Version: 1.0
Main-Class: com.ensarm.
Line niidle.jar/lib/hector-0.6.0-17.jar is confusing. Is niidle.jar directory or file? I'd suggest you to post your full manifest, directory structure, command line you are using and current working directory.
But generally you should write in your manifest: Class-Path: hector-0.6.0-17.jar
then put all jars in one directory. Let's call it foo
.
Now open command prompt, go to foo and run
java -jar niidle.jar args...
And I believe that everything will work. Then if you wish play with location of your jars.