Are you working in IT operations and responsible to keep the your systems safe and sound? Did you know that you can use Liferea (or any other news aggregator) as your primary source for security advisories and vulnerability news?
Using official feeds from Unix distributions and software vendors as well as aggregated feeds from sites as http://cvedetails.com/ you can get everything bundled in your news aggregator.
By selecting only the feeds for the distros and software stacks you run you get only the information you need (as to compared to all-purpose CERT bulletins). By using a news aggregator you keep track of the read status per advisory and can flag relevant advisories for later reference.
Feel free to check out my overview list of Unix / Linux IT Security Feeds!