Google 大爆炸的原因：人為疏失。
https://b2.zeroplex.tw/2009/01/this-site-may-harm-your-computer-on.html
We periodically receive updates to that list and received one such update to release on the site this morning. Unfortunately (and here’s the human error), the URL of ‘/’ was mistakenly checked in as a value to the file and ‘/’ expands to all URLs.
印象中我之前手殘打過：
rm -fr /