adding up a column of numbers 2

[sjsp]

Does anyone know how to add up a column of numbers, e.g kilobytes from df -k output?

 

[pcunix]

Using awk is best if there is more than just the column as per your example, or you can use "cut" to extract the specific column and do it in the shell

x=0
for i in `du -sk * | cut -f1`
do
x=$(( x + i ))
done
echo $x

(bash or ksh, sh would use 'expr' for the math)

Tony Lawrence
SCO Unix/Linux Resources

http://pcunix.com

tony@pcunix.com

 

[grega]

Cool ... I didn't know about the $((....)) to math in ksh/bash.

Cheers

Greg.

 

[sjsp]

Thank you, this was a useful Tek Tip

 

[cspilman]

Here is the same example using awk:

du -sk * | awk '{sum += $1} END {print "Total: ", sum;}'

This allows you to tie everything into one command. Regards,
Chuck

chuck.spilman@nokia.com