using du command

Shell Programming and Scripting
1

Hi,

is there a way to use "du" command without going in all the subtree ?

i have a dir called "rep" for exemple with many subdir as rep1;rep2;rep3 and so on.

I would calculate the "rep" size without having to calculate all the subdir.
Is it possible to do that without doing:

du -k rep|grep rep

thanks in advance
Christian

2

du -sh /path/to/rep

Hope this helps...:slight_smile:

3

thanks

on my AIX server the flag "h" is not valid , what does it mean ?

regards
Christian

4

Formats the output 'human readable' example: 1.2TB or 56GB instead of a massive number.

5

h stands for human-readable.

6

"-h" is "human readable" on Linux systems (which nowadays usually means "display in Gigabytes").

On AIX systems you could use "-k" instead to get the values displayed in units of kilobytes or nothing at all to get bytes. The important part is the flag "-s", which traverses subdirectories and sums up recursively all the content there.

The value displayed for "/some/dir" is the sum of all the files in "/some/dir" plus all the files and sums of subdirs in "/some/dir/subdir1" plus the all the files and sums of subdirs in "/some/dir/subdir2", etc..

If you need to convert this to MBs (GBs, ...) use "bc" and divide by 1024 (repeatedly).

For instance:

# du -ks /home/bakunin
58829668        /home/bakunin   # <= in KBs

# print - "58829668/1024" | bc
57450                           # <= in MBs

# print - "58829668/1024/1024" | bc
56                              # <= in GBs

I hope this helps.

bakunin

1 Like
7

Thanks

but there's no way to count the "rep" dir without going through subdir ?

i hope no

Christian

8

With -x

-x When evaluating file sizes, evaluates only those files that reside on the same device as the file or directory specified by the File parameter. For example, you may specify a directory that contains files on several devices. In this case, the -x flag displays block sizes for all files that reside on the same device as the directory.

9 
cd /path/to/rep
du -sk .

or

du -sk /path/to/rep
10

Below command counts only the disk usage of rep and not its sub-directory..

find /path/to/rep -maxdepth 1 -type f -exec du -hs {} \; | awk '{i=$1+i} END {print i}'
11

thanks for your help,

the maxdepth doesn't work on AIX machine....

regards
Christian

12

hmm.. try to search this forum or other external sites for the equivalent of maxdepth in AIX. I could find this post quite relevant.

13

thanks

i think this is a good way to search

Christian

14

Without the "-s" flag "du" works non-recursively, therefore, to get the disk usage of all the files in "/the/directory/rep" issue:

du /the/directory/rep/*

(and add "-k" if you want it in Kilobytes instead of bytes)

I hope this helps.

bakunin