as mentioned, I found that the command
du -h
The file size obtained by differs greatly from the actual file size, as shown in the following figure (the distribution version of linux is centos7)
screenshot 2019-01-20 afternoon 3.03.22.png
test1 files actually use only 77 bytes, but 4.0k is counted with du-h. I don"t know why?
in addition, I would also like to ask if this 4.0k has any special meaning under linux? Because I see that many folders are 4.0kb after ll-h, but the size of these folders is not 4kb at all