Suppose that you have accidentally published a blog entry that you really didn't want to and now want to retract, unpublish, disappear, or the synonym ofyour choice the entry. You could just delete the entry, but thishas a problem: your syndication feeds (RSS, Atom, et al).

Specifically, removing an entry from your blog and thus your feeddoesn't remove it for people who've already fetched a version of yourfeed that included the entry. Feed readers keep their own

Recently, for my version of recently, a shell history meme has beengoing around various places .Thinking about the meme and what it would look like for me has ledme to thinking about two different usage patterns in Unix graphicalenvironments; I will call these persistent and disposable.

People who follow the persistent pattern like long-lived, multi-purposecontexts; for example, they are inclined to leave a terminal window or ashell session active for a long time, and over its lifetime such a shellwill wind