Re: cut(1) and space delimiters

[Ron Johnson <ron.l.johnson@cox.net>]

On 2010-03-19 21:54, Mike Viau wrote:
> Fri, 19 Mar 2010 21:34:47 -0500 <ron.l.johnson@cox.net> wrote:
> > Googled and followed examples, which work, but my specific problem 
> > doesn't work...
> >
> > WORKS:
> > $ service="http mail ssh"
> > $ echo $service | cut -d\  -f2
> > mail
> > $ echo $service | cut -d' ' -f2
> > mail
> > dpkg --get-selections | grep -v deinstall$ | awk '{print $1}'
> >
> >
> > DOES NOT WORK:
> > $ dpkg --get-selections | grep -v deinstall$ | cut -d' ' -f1
> > $ dpkg --get-selections | grep -v deinstall$ | cut -d\  -f1
> >
> >
> > Is the problem that there's so *much* whitespace in the dpkg listing?
>
> Firstly I am no pro at string manipulation but the working examples seems to have no line feed characters, whereas the "dpkg --get-selections" creates a new line for every package it prints.
>
> In Unicode (linux)
>
> LF:    Line Feed, U+000A
>
> I tried "dpkg --get-selections | grep -v deinstall$ | cut -d'\n' -f1"  but still had not luck though...

The newline should have no effect.  This, for example, works perfectly:

$ apt-show-versions -u | cut -d/ -f1



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