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Operating Systems Linux Red Hat Command for cumulative disk space Post 302757047 by Skrynesaver on Thursday 17th of January 2013 03:56:18 AM
Old 01-17-2013
There's got to be a neat way of summing a column which meets given criteria using awk only, which someone will no doubt enlighten me with.

In the interim, this works under bash and ensures that the tempfs isn't counted as real space
Code:
total_free=0;for i in $(df -k | egrep '^/dev'| awk '{print $4}' ) ; do total_free=$(($total_free + $i)); done ; echo Total free space on $(hostname) is ${total_free}K

 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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