Request Info regarding current menu items for Knoppix 6.2.1 etc/apt/sources.list

[rajibando]

Yes, sir, I understand that.
But please also address my query: So where is the error :: http://archive.debian.org lenny Release.gpg :: coming from?
I have changed the line.
I have an idea regarding the GPG keys. If I am successful I will post in the forum.
Regards

[Werner P. Schulz]

But please also address my query: So where is the error :: http://archive.debian.org lenny Release.gpg :: coming from?

I don't know. I fear it's an effect of using a very old release and the installed tool "debian-archive-keyring" causes the error.