How to know the size of a flie

How to know the size of a flie

when I use the console mode ,I really don't know.
which command I should  use ? I found it for long ,but no result .
看这篇文章

拜托,问问题之前先看看精华区或者先看看有没有提到过类似的问题

另外,df -h可以查看磁盘使用状况。
I try it ,
but it just know how the file use the disk space .
Still don't know the file size .
For instance , I have a file of 512B , but it display 4k after use "du ...".
It's no correct !
any other commands ?
[quote:e3922945ba="lokii"]I try it ,
but it just know how the file use the disk space .
Still don't know the file size .
For instance , I have a file of 512B , but it display 4k after use "du ...".
It's no correct !
any other commands ?[/quote]
哗,看来你问得是比较深入的问题,我不知道啦
du -h filename 不行吗? 那用ls -s呢?