Awk examples !!

[Whitehorse_1]

Hi Admins,

Can somebody gimme good examples (not man pages) for 'awk' usage...

Thxs, WH

[Peter Godron]

Hi,
not clear what you are after, however...

Example of awk useage:
http://www.student.northpark.edu/pemente/awk/awk1line.txt

And for further study:
http://en.wikipedia.org/wiki/AWK_programming_language

[Piergiacomo Perini]

Hi WH,

a little example:

awk â Fâ â â { print $1, $2, $3 }â file_name


-F : Field Separator (in this case is â blankâ ).
So you can select first three column from "file_name" (in "file_name" data are formatted in columns).

Hth
regards
pg

[Piergiacomo Perini]

i beg your pardon, here the right command :

awk â F´ ` `{ print $1, $2, $3 }´ file_di_input

[Piergiacomo Perini]

_today is NOT a good day, for me_

awk -  F´ ` `{ print $1, $2, $3 }´ file_di_input

[OldSchool]

you might also try to get ahold of the book "sed & awk" published by o'reilly

[Pete Randall]

Attached are some examples.


Pete

[James R. Ferguson]

Hi:

I'm not convinced that examples in the abstract are going to be that helpful.

A nice tutorial (*with* examples *and* explanations) can be found here:

http://www.gnu.org/software/gawk/manual/gawk.html

Regards!

...JRF...

[A. Clay Stephenson]

Since you don't even bother to explain what you are trying to do, it's difficult to be very helpful. In any event, a simple search of the Forums for "awk" should yield hundreds (at least) of examples ranging from trivial one-liners to very complex awk scripts.

If you are learning from scratch, I might suggest a Plan B: learn Perl. The learning curve is steeper but the power is much greater.

The O'reilly "sed & awk" is hard to beat and it has a good sectio on regular expressions. RE's are really the key to effectively using awk, sed, or Perl. Perl's RE's are RE's on steroids and make things that might require several steps in awk doable in one step.

[IT_2007]

Here is if you want to grab only volume group names from /etc/lvmtab

strings /etc/lvmtab |grep vg |awk -F "\/" '{print $3}'

which will print only name of volume groups (excludes /dev path)