Sydney comment on Famous Awk One-Liners Explained, Part I: File Spacing, Numbering and Calculations

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Perl one-liners explained

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Sydney Permalink

October 07, 2008, 07:23

Thanks so much Peteris,

I am only ever using GNU AWK on Redhat or Ubuntu maybe Debian rarely. So I mutated the first into:

df -h | awk '/\// { if (strtonum($(NF-1)) >= 20) { print $NF ": " $(NF-1) } }'

I am guessing that strtonum function that you suggested takes it out of the string world. I was trying to compare a string to a number.

The RegEx /\// found all mounts.

df output is not constant in Red Hat with long mount names

/shrug

Who knew? So I changed the code to work backwards from the last field.

Thanks a bunch this was an interesting experiment for me that I may turn around and tweak for production.

seven Permalink

August 04, 2010, 06:14

Hi,

Please let me know the command to list files having specific number of rows. I want to list all the files having only 3 rows only.

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Famous Awk One-Liners Explained, Part I: File Spacing, Numbering and Calculations