checking file size

Question

I want to check the file size in shell script. I am trying to check if the file in a specific directory exceeded 2 gb i.e 2147483648 bytes.

How can I easily do this in shell script?

I have the following 2 files:

-rw-rw-rw-    1 op       general  1977591120 Jul 02 08:27 abc
-rw-rw-rw-    1 op       general  6263142976 Jul 01 18:39 xyz

When I run find . -size +2047MB, I get both the files as output

./abc
./xyz

I expect only xyz in the output size it is ~6gb and abc is slightly less than ~2gb. WHat can be the reason for both files showing up in the output?

Answer 1

My guess would be that find is including the file system overhead and any unused space in the cluster occupied by the file.

Answer 2

Try find . -size +2047M without the B. This seems to work in subdirectories too.

Answer 3

Compare:

stat -f "%z bytes   %N"  ./*     # FreeBSD stat                                         syntax highlighter fix */

find . -size +$((2*1024*1024*1024))c    #  man 1 find | less -p '-size'

Answer 4

Have you tried giving +2G instead of MB ?

Answer 5

How to find files in a specific directory

What man says

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-size n[cwbkMG]

         File uses n units of space.  The following suffixes can be used:

         `b'    for 512-byte blocks (this is the default if no suffix is used)
         `c'    for bytes 
         `w'    for two-byte words
         `k'    for Kilobytes (units of 1024 bytes)
         `M'    for Megabytes (units of 1048576 bytes) 
         `G'    for Gigabytes (units of 1073741824 bytes)  

Examples

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Find files larger than 2GB in the current directory, but don't look in subdirectories

find . -size +2G -maxdepth 1

Output it with ls -dils format

find . -size +2G -maxdepth 1 -ls

Other Comments

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I'm surprised your MB didn't kick out an error. Example: find: invalid -size type `B'
This may be due to your distro.