find . -size -1GB in Centos

Question

In Centos, I have a text file in my home directory.

The command find . -size -1M doesn't show my file but find . -size -1000k does show it. This problem just seems to be happening when I use the number "1". The first command will work if I use -2M even though the file is only 500k in size.

Am I doing something wrong?

Answer 1

find . -size -1M will only show file of size less than 1M, that is 0M. Yes, I know, it's confusing.

find . -size 1M will show you files whose size (rounded up to the upper MiB) is 1M (so any file size from 1 to 1048576). If you want from 0 to 1048575 (< 1M), that would be:

find . -size -1048576c

If you want from 0 to 1048576 (<= 1M)

find . -size -2M

or

find . ! -size +1M