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find has several operators that take a decimal integer. One such argument is -size. The number after this argument is the size of the files in disk blocks. Unfortunately, this is a vague number. Earlier versions of Unix used disk blocks of 512 bytes. Newer versions allow larger block sizes, so a "block" of 512 bytes is misleading.
This confusion is aggravated when the command ls -s is used. The -s option supposedly lists the size of the file in blocks. But if your system has a different block size than ls -s has been programmed to assume, it can give a misleading answer. You can put a c after the number and specify the size in bytes. To find a file with exactly 1,234 bytes (as in an ls -l listing), type:
% find . -size 1234c -print
To search for files using a range of file sizes, a minus or plus sign can be specified before the number. The minus sign (-) means less than, and the plus sign (+) means greater than. This next example lists all files that are greater than 10,000 bytes, but less than 32,000 bytes:
% find . -size +10000c -size -32000c -print
When more than one qualifier is given, both must be true.
-- BB
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| 9.13. Searching for Files by Type |  | 9.15. Searching for Files by Permission |
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