I am on linode and precise LTS. I did this, and I got no bash update. What am I doing wrong? edit: and how do I know if I am still vulnerable? edit2: ok, this

I am on linode and precise LTS. I did this, and I got no bash update. What am I doing wrong? edit: and how do I know if I am still vulnerable? edit2: ok, this is the test env x='() { :;}; echo vulnerable' bash -c "echo this is a test" and apparently I am already patched. So that's good.