update problem

Hi people,
just installed CAELinux, but I can't do packages update, it seems a repo (www.remastersys.com) doesn't exist anymore as domaine name, I'm waiting for the end of procedure, but it takes a too much long time; otherwise, I tried to find that repo in apt directory to ignore it in updating, without results; any idea about?

If you don't find answer yet, I'm not sure but maybe help:
toolbar: System-> Settings ->Software & Updates. Then overlap "Other Software" and "uncheck" position with remastersys

repo list is in file: /etc/apt/sources.list