Actually, the article linked also says 'during Linux switch', however the starter of this thread decided to change it to 'London Stock Exchange got hacked as soon as it switched to Linux', for what reason is anyone's guess but it's obviously false. Add to that, the article only speculates that there even was an attack, so can you say FUD?
Originally Posted by renkin
Facts are, under much fanfare Microsoft announced that the London stock exchange was switching to Microsoft servers and .NET. After a series of problems culminating in the system collapsing and stopping trade for almost an entire day, a switch to Linux was decided (which is what New York stock exchange is running for example).