An interesting question: What is total in the content displayed by ls-l?

An interesting question: What is total in the content displayed by ls-l?

When we use the ls-l command, we will see the following similar information.

Many people may not be very concerned about the value of total 12 in the first line, but have you ever wondered what it means?
<喎?http: www.bkjia.com kf ware vc " target="_blank" class="keylink"> VcD4KPHA + bWFu1tC1xMu1w/ejrM7Sw8e/authorization + authorization/rvyxL/CvLXEtPPQoaGj1NrV4sDvxL/CvLXEtPPQobKit8fKx8S/wrzL + authorization Examples/examples + PC9zdHJvbmc + obDV4r7ku7C1xLqs0uWhozwvcD4KPHA + xMfDtKOs0rK + examples + 0v7TKx7K7ysfI57TLoaM8L3A + examples/examples + Release + release/s + 1zbPW0MrH09BibG9jayi/6Sm1xLjFxO61xKOsv + m + zc/release + 8 TjtcPOxLz + export + 087XEzsS8/release + cjxwpsomething W7TK/large + large 0KG + zcrHIKGw1bzTw6GxtcS/1bzkoaM8L3A + large + 00ru/tM + large + cq + o7o8L3A + large = "http://www.2cto.com/uploadfile/Collfiles/20150402/2015040210054928.png" alt = "n エ ky" http://www.bkjia.com/ OS/"target =" _ blank "class =" key Link "> one block in the system has 4 k. So how many blocks does 8.74902k occupy?

It apparently occupies three blocks. Although only 0.74902k data is stored in the third block, it still occupies one block space. ,

So the occupied space displayed by total is 3 * block = 3*4 k = 12 k

Do you understand?