[gentoo-user] [OT] Filename modification with suffix

[gentoo-user] [OT] Filename modification with suffix

[Marco Calviani]

Hi list,
   maybe this question is a little bit related since it regards non
Gentoo-specific topics.
I would like to add a specific suffix to a list of files. For example
i have files of the type:

duck1.jpg
duck2.jpg
duck3.jpg

and i would like them to become:

donald_duck1.jpg
donald_duck2.jpg
donald_duck3.jpg

Does somebody knows a simple way to do this via shell?

Thanks in advance,
MC

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Re: [gentoo-user] [OT] Filename modification with suffix

[David Morgan]

On 14:24 Thu 29 Dec     , Marco Calviani wrote:
> i have files of the type:
> 
> duck1.jpg
> duck2.jpg
> duck3.jpg
> 
> and i would like them to become:
> 
> donald_duck1.jpg
> donald_duck2.jpg
> donald_duck3.jpg
> 

for i in duck*.jpg ; do mv ${i} donald_${i} ; done
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Re: [gentoo-user] [OT] Filename modification with suffix

[Christoph Eckert]

> i have files of the type:
>
> duck1.jpg
> duck2.jpg
> duck3.jpg
>
> and i would like them to become:
>
> donald_duck1.jpg
> donald_duck2.jpg
> donald_duck3.jpg
>
> Does somebody knows a simple way to do this via shell?

for i in $(ls *.jpg); do mv $i donald_$i; done


Best regards


ce
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Re: [gentoo-user] [OT] Filename modification with suffix

[Ciaran McCreesh]

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On Thu, 29 Dec 2005 14:24:31 +0100 Marco Calviani
<marco.calviani@gmail.com> wrote:
| duck1.jpg
| duck2.jpg
| duck3.jpg
| 
| and i would like them to become:
| 
| donald_duck1.jpg
| donald_duck2.jpg
| donald_duck3.jpg
| 
| Does somebody knows a simple way to do this via shell?

rename '' 'donald_' duck*.jpg

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Mail            : ciaranm at gentoo.org
Web             : http://dev.gentoo.org/~ciaranm


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Re: [gentoo-user] [OT] Filename modification with suffix

[David Morgan]

On 14:38 Thu 29 Dec     , Christoph Eckert wrote:
> $(ls *.jpg)

ick!

(incidentally, http://www.ruhr.de/home/smallo/award.html#ls)
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Re: [gentoo-user] [OT] Filename modification with suffix

[Christoph Eckert]

> > $(ls *.jpg)
>
> ick!
>
> (incidentally, http://www.ruhr.de/home/smallo/award.html#ls)

I forgot to clarify that the CPU of my notebook usually is bored and 
waits until I move my mouse, so some ls processes can make it a bit 
busy :) .


Best regards


ce
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Re: [gentoo-user] [OT] Filename modification with suffix

[Marco Calviani]

2005/12/29, David Morgan <david.morgan@wadham.oxford.ac.uk>:

>
> for i in duck*.jpg ; do mv ${i} donald_${i} ; done

Well! Thank you very much David. That solved my problem!

Best regards,
MC

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Re: [gentoo-user] [OT] Filename modification with suffix

[Jerry McBride]

On Thursday 29 December 2005 08:24, Marco Calviani wrote:
> Hi list,
>    maybe this question is a little bit related since it regards non
> Gentoo-specific topics.
> I would like to add a specific suffix to a list of files. For example
> i have files of the type:
>
> duck1.jpg
> duck2.jpg
> duck3.jpg
>
> and i would like them to become:
>
> donald_duck1.jpg
> donald_duck2.jpg
> donald_duck3.jpg
>
> Does somebody knows a simple way to do this via shell?
>

Did anyone mention RENAME???

A simple "rename duck donald_duck duck*.jpg" would work well also....

Cheers.



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Re: [gentoo-user] [OT] Filename modification with suffix

[Lithion]

Such a question shows the power of bash programming. 
Method1 : 

ls -1 *.jpg | while read file; do mv "$file" \
 "donald_$file"; done

Method2 :
ls -1 *.jpg | awk '{ print "mv "$1" donald_"$1; } | \
  /bin/bash

Method3 :
find -name "*.jpg" -exec mv {} donald_{} ';'

On Fri, 30 Dec 2005 11:57 am, Jerry McBride wrote:
> On Thursday 29 December 2005 08:24, Marco Calviani wrote:
> > Hi list,
> >    maybe this question is a little bit related since it regards non
> > Gentoo-specific topics.
> > I would like to add a specific suffix to a list of files. For
> > example i have files of the type:
> >
> > duck1.jpg
> > duck2.jpg
> > duck3.jpg
> >
> > and i would like them to become:
> >
> > donald_duck1.jpg
> > donald_duck2.jpg
> > donald_duck3.jpg
> >
> > Does somebody knows a simple way to do this via shell?
>
> Did anyone mention RENAME???
>
> A simple "rename duck donald_duck duck*.jpg" would work well also....
>
> Cheers.
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Re: [gentoo-user] [OT] Filename modification with suffix

[Matthias Bethke]

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Hi David,
on Thursday, 2005-12-29 at 13:53:17, you wrote:
> > $(ls *.jpg)
> 
> ick!
> 
> (incidentally, http://www.ruhr.de/home/smallo/award.html#ls)

Well, it's bad in two ways, and even the example on the above webpage is
wrong. For one thing, "ls" is useless here. For another, it will break
on spaces in filenames, unlike shell globbing:
| $ touch "foo bar.jpg"
| $ for f in *.jpg; do echo $f; done
| foo bar.jpg
| $ for f in `ls *.jpg`; do echo $f; done
| foo
| bar.jpg
| $ for f in `ls *.jpg`; do echo "$f"; done
| foo
| bar.jpg
The bottommost try shows that the comment "newbies will often forget the
quotes, too" is wrong -- it won't work either way. If you have to use
a program that outputs a filename per line like ls, use a read loop:
| $ ls *.jpg | while read f; do echo "$f"; done
| foo bar.jpg
The quotes are useless for "echo" here, but for other commands you'll
usually need them to keep the command form taking filenames with sapaces
as separate arguments.

cheers!
	Matthias

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[gentoo-user] Re: [OT] Filename modification with suffix

[Francesco Talamona]

On Saturday 31 December 2005 20:38, Matthias Bethke wrote:
> Hi David,
>
> on Thursday, 2005-12-29 at 13:53:17, you wrote:
> > > $(ls *.jpg)
> >
> > ick!
> >
> > (incidentally, http://www.ruhr.de/home/smallo/award.html#ls)
>
> Well, it's bad in two ways, and even the example on the above webpage
> is wrong. For one thing, "ls" is useless here. For another, it will
> break
>
> on spaces in filenames, unlike shell globbing:
> | $ touch "foo bar.jpg"
> | $ for f in *.jpg; do echo $f; done
> | foo bar.jpg
> | $ for f in `ls *.jpg`; do echo $f; done
> | foo
> | bar.jpg
> | $ for f in `ls *.jpg`; do echo "$f"; done
> | foo
> | bar.jpg
>
> The bottommost try shows that the comment "newbies will often forget
> the quotes, too" is wrong -- it won't work either way. If you have to
> use
>
> a program that outputs a filename per line like ls, use a read loop:
> | $ ls *.jpg | while read f; do echo "$f"; done
> | foo bar.jpg
>
> The quotes are useless for "echo" here, but for other commands you'll
> usually need them to keep the command form taking filenames with
> sapaces as separate arguments.
>
> cheers!
> 	Matthias

It is the first part of the command, the one expanding ls output that 
needs quotes...

$ for f in $"`ls *.jpg`"; do echo $f; done
foo bar.jpg

Ciao
	Francesco
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[gentoo-user] Re: [OT] Filename modification with suffix

[Francesco Talamona]

On Saturday 31 December 2005 22:04, Francesco Talamona wrote:
> $ for f in $"`ls *.jpg`"; do echo $f; done
> foo bar.jpg

Little typo, I made an hybrid :-)

[sko@aemaeth:~]$ for f in "$(ls *.jpg)"; do echo $f; done
foo bar.jpg
[sko@aemaeth:~]$ for f in "`ls *.jpg`"; do echo $f; done
foo bar.jpg

Ciao
	Francesco
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Re: [gentoo-user] Re: [OT] Filename modification with suffix

[Alexander Skwar]

Francesco Talamona schrieb:
> On Saturday 31 December 2005 22:04, Francesco Talamona wrote:
>> $ for f in $"`ls *.jpg`"; do echo $f; done
>> foo bar.jpg
> 
> Little typo, I made an hybrid :-)
> 
> [sko@aemaeth:~]$ for f in "$(ls *.jpg)"; do echo $f; done
> foo bar.jpg
> [sko@aemaeth:~]$ for f in "`ls *.jpg`"; do echo $f; done
> foo bar.jpg

Still wrong. Still just one line of output. Cause of
error: The use of " in the "for" loop.

Further: No need to use ls.

Alexander Skwar
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Re: [gentoo-user] [OT] Filename modification with suffix

[Neil Bothwick]

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On Sat, 31 Dec 2005 20:38:32 +0100, Matthias Bethke wrote:

> | $ ls *.jpg | while read f; do echo "$f"; done
> | foo bar.jpg
> The quotes are useless for "echo" here, but for other commands you'll
> usually need them to keep the command form taking filenames with sapaces
> as separate arguments.

The quotes are only unnecessary for echo if filenames only contain single
spaces, multiple consecutive spaces will be converted to a single space
if not quoted.

$ echo "Hello  there"
Hello  there
$ echo Hello  there
Hello there


-- 
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Never get into fights with ugly people because they have nothing to lose.

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[gentoo-user] Re: [OT] Filename modification with suffix

[Francesco Talamona]

On Saturday 31 December 2005 22:47, Alexander Skwar wrote:
> Francesco Talamona schrieb:
> > On Saturday 31 December 2005 22:04, Francesco Talamona wrote:
> >> $ for f in $"`ls *.jpg`"; do echo $f; done
> >> foo bar.jpg
> >
> > Little typo, I made an hybrid :-)
> >
> > [sko@aemaeth:~]$ for f in "$(ls *.jpg)"; do echo $f; done
> > foo bar.jpg
> > [sko@aemaeth:~]$ for f in "`ls *.jpg`"; do echo $f; done
> > foo bar.jpg
>
> Still wrong. Still just one line of output. Cause of
> error: The use of " in the "for" loop.
>
> Further: No need to use ls.

You are right! I tested in a folder containing just "foo bar.jpg"
Of course a one-line output defeats the usefulness of "for" cycle :-)

cheers
	Francesco

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