Comments on: 8 Powerful Awk Built-in Variables – FS, OFS, RS, ORS, NR, NF, FILENAME, FNR

By: Manu

Manu — Sun, 18 Dec 2011 05:46:20 +0000

Ramesh,
Still ex:3 is not giving expected result(shown in your example).The op is each filed is still in a new line with a space after end of field (before \n on each line).
My env is AIX 6.1 (not sure of awk version) awk –version|head -1 did not give any result.I have even tried with nawk but op did not change.

By: Hemanth

Hemanth — Tue, 22 Nov 2011 14:08:28 +0000

Good aricle
Helped me a lot

By: fhefh

fhefh — Thu, 17 Nov 2011 03:17:32 +0000

you blog is good
thanks

By: Colin

Colin — Fri, 24 Jun 2011 09:12:28 +0000

I have the following which works fine on AIX but does not on Linux using Gawk

echo “a:b:c” | awk ‘{FS=”:”; print $2}’

On AIX it produces
b
as expected

On Linux it produces a blank line
???

I have a 100+ line awk script which makes a lot of use of FS so I need to be able to change it from : to a space to a % within the script rather than simply use -F

By: SAID AL_SARIRI

SAID AL_SARIRI — Mon, 11 Apr 2011 10:23:25 +0000

In breif this useful web for anyone went to study, so i am intresting in its subjects , specially lunix

By: Anonymous

Anonymous — Thu, 07 Apr 2011 10:56:10 +0000

The Best description about Built-in Variables of awk.

By: Ramesh Natarajan

Ramesh Natarajan — Sat, 15 Jan 2011 04:56:13 +0000

@Frank Huang,

Thanks for pointing it out. I’ve corrected it. Just FYI. For me both FS”\n” and FS=”\n” worked. I’m using GNU awk.

$ awk --version | head -1
GNU Awk 3.1.7

@Guru, @Arthur,

Please try again with FS=”\n” and see if it works again. If not, can you let me know what version of Awk you are using?

By: arthur

arthur — Mon, 13 Dec 2010 15:07:49 +0000

example 3 is still not producing the desired the output.The output produced is the same as the input

By: frankhuang

frankhuang — Fri, 19 Nov 2010 02:59:09 +0000

to Guru
because there is an error in example 3
line
FS”\n”;
should be
FS=”\n”;

By: 50 Most Frequently Used UNIX / Linux Commands (With Examples)

50 Most Frequently Used UNIX / Linux Commands (With Examples) — Mon, 08 Nov 2010 06:04:04 +0000

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