in reply to Unix size

You may want to man the 'du' command and see if '--total' on your system is correct. 'du' counts files so you need the '*' after the directory. 


perl -e '@size=qx|du --total /home/*|;print $size[$#size];'

my result: "1093296      total"

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Re^2: Unix size
by MidLifeXis (Monsignor) on Feb 07, 2012 at 13:34 UTC
    'du' counts files so you need the '*' after the directory.

    Not true. Under HP-UX, du -s gives the grand total of disk usage for each of the specified name operands.1 The BSD man page for du also includes the -s flag (aka --summary), so it is not quite the same as --total (which BSD also has, but not HP-UX). The total can be obtained with a perl oneliner: perl -ne '@d=split($_); $t += $d[0]; END{print $t}'

    1 - HP-UX 11.11 du man page

    --MidLifeXis

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      -s is also in the POSIX standard (IEEE Std 1003.1-2008):
      Instead of the default output, report only the total sum for each of the specified files
      but not --total
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