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I have to manage a few Serendipity (s9y) installations. Only one of them is my personal blog, the others are customer installations, all on different servers. Apart from new Serendipity versions, there’s also the problem with updated plugins. How can one know about available updates without opening each blog in a browser window, open administration, select Configure Plugins and check for new sidebar and event plugins?

I have shell accounts on different servers. Sometimes - especially if new Debian/Ubuntu/Redhat/Fedora updates are available - I have to open a ssh session to each server. That takes time and too many keyboard clicks and being a lazy admin I thought this job can be scripted.