Android : jarsigner doesn't work Ubuntu

I am trying to figure out how to sign apk with android debug key but when I use jarsigner after deleting meta from apk, I get the following error: http://i.stack.imgur.com/ltOMv.png

Please help. I have java -version showing installed. Proof: http://i.stack.imgur.com/gr1P8.png

I have Ubuntu 12.10 installed