simple echo into multiple files...

[bruce]

morn/quick question...

say you have
aa.aa
aaa.aa

is there a "simple" way to do
echo 'b' > *.aa

this doesn't work, gets a redirection error

I know one can write a quick bash/shell loop.. any other ways?

thanks

[Richard Shaw]

On Wed, Jan 25, 2017 at 8:02 AM, bruce <badouglas(a)gmail.com&gt; wrote:

>  I know one can write a quick bash/shell loop.. any other ways?
>  
for $file in *.aa; do
    echo 'b' > $file;
done

Richard

[Ian Pilcher]

On 01/25/2017 08:02 AM, bruce wrote:
>  morn/quick question...
>
>  say you have
>  aa.aa
>  aaa.aa
>
>  is there a "simple" way to do
>  echo 'b' > *.aa 
If you don't need to doing it with an arbitrary number of files, you
can do this with one or more tee(1) commands.  For example:

   echo 'b' | tee a.txt | tee b.txt > c.txt

-- 
========================================================================
Ian Pilcher                                         arequipeno(a)gmail.com
-------- "I grew up before Mark Zuckerberg invented friendship" --------
========================================================================

[Joe Wulf]

Bruce,
#  Create two new filesecho  'b'  |  tee  aa.aa  aaa.aa
#  Append 'b' to two existing filesecho  'b'  |  tee  -a  aa.aa  aaa.aa
Strongly recommend getting "Unix In A NutShell" from O'Reilly and peruse it
periodically; it is an excellent reference for all such things and will make you far more
invaluable in researching and solving these kinds of problems.
      From: bruce <badouglas(a)gmail.com&gt;
 To: Community support for Fedora users <users(a)lists.fedoraproject.org&gt; 
 Sent: Wednesday, January 25, 2017 9:02 AM
 Subject: simple echo into multiple files...
   
morn/quick question...

say you have
aa.aa
aaa.aa

is there a "simple" way to do
echo 'b' > *.aa

this doesn't work, gets a redirection error

I know one can write a quick bash/shell loop.. any other ways?

thanks
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To unsubscribe send an email to users-leave(a)lists.fedoraproject.org

[Roberto Ragusa]

On 01/25/2017 03:42 PM, Joe Wulf wrote:
>  Bruce,
>  
>  #  Create two new files
>  echo  'b'  |  tee  aa.aa  aaa.aa
>   
With wildcard expansion:

echo 'b' | tee *.aa

-- 
   Roberto Ragusa    mail at robertoragusa.it

[Roberto Ragusa]

On 01/25/2017 04:10 PM, Roberto Ragusa wrote:
>  On 01/25/2017 03:42 PM, Joe Wulf wrote:
> > Bruce,
> >
> > #  Create two new files
> > echo  'b'  |  tee  aa.aa  aaa.aa
> >
>  
>  With wildcard expansion:
>  
>  echo 'b' | tee *.aa
>   
well, of course not when creating new files, but that would work for append ("tee
-a")

-- 
   Roberto Ragusa    mail at robertoragusa.it

[George N. White III]

On Wed, Jan 25, 2017 at 10:03 AM bruce <badouglas(a)gmail.com&gt; wrote:

>  morn/quick question...
>
>  say you have
>  aa.aa
>  aaa.aa
>
>  is there a "simple" way to do
>  echo 'b' > *.aa
>
>  this doesn't work, gets a redirection error
>
>  I know one can write a quick bash/shell loop.. any other ways? 
Avoid unnecessary copies:

  echo 'b' > a

>    for f in b c d f ; do ln a $f ; done 

>  thanks
>  _______________________________________________
>  users mailing list -- users(a)lists.fedoraproject.org
>  To unsubscribe send an email to users-leave(a)lists.fedoraproject.org
>

[Joe Wulf]

Thanks Roberto, yes, that is elegant even.:)

      From: Roberto Ragusa <mail(a)robertoragusa.it&gt;
 To: users(a)lists.fedoraproject.org 
 Sent: Wednesday, January 25, 2017 10:10 AM
 Subject: Re: simple echo into multiple files...
   
On 01/25/2017 03:42 PM, Joe Wulf wrote:
>  Bruce,
>  
>  #  Create two new files
>  echo  'b'  |  tee  aa.aa  aaa.aa
>   
With wildcard expansion:

echo 'b' | tee *.aa

-- 
  Roberto Ragusa    mail at robertoragusa.it
_______________________________________________
users mailing list -- users(a)lists.fedoraproject.org
To unsubscribe send an email to users-leave(a)lists.fedoraproject.org

[Roberto Ragusa]

On 01/25/2017 05:23 PM, George N. White III wrote:
>  Avoid unnecessary copies:
>  
>    echo 'b' > a
>  
>    for f in b c d f ; do ln a $f ; done 
But then

echo 'x' > d

and have a look at c.
It may not be want you want.

-- 
   Roberto Ragusa    mail at robertoragusa.it

[Cameron Simpson]

On 25Jan2017 08:42, Ian Pilcher <arequipeno(a)gmail.com&gt; wrote:
> On 01/25/2017 08:02 AM, bruce wrote:
> >say you have
> >aa.aa
> >aaa.aa
> >
> >is there a "simple" way to do
> >echo 'b' > *.aa
>
> If you don't need to doing it with an arbitrary number of files, you
> can do this with one or more tee(1) commands.  For example:
>
>   echo 'b' | tee a.txt | tee b.txt > c.txt 
You can do it with a single tee command you know:

  echo b | tee *.aa >/dev/null

or more likely (depends on the OP's use case):

  echo b | tee -a *.aa >/dev/null

Cheers,
Cameron Simpson <cs(a)zip.com.au&gt;

[Matthew Miller]

On Fri, Jan 27, 2017 at 09:49:28AM +1100, Cameron Simpson wrote:
>  You can do it with a single tee command you know:
>   echo b | tee *.aa >/dev/null
>  or more likely (depends on the OP's use case):
>   echo b | tee -a *.aa >/dev/null 
Be aware that if there are no files matching *.aa, you will get a new
file literally named that. You can use `shopt -s failglob` in bash to
make this a failure instead.

If you *know* your files don't exist but
know your filenames, you could do:

   echo b | tee -a {a1,a2,a3}.aa

resulting in a1.aa, a2.aa, and a3.aa.

-- 
Matthew Miller
<mattdm(a)fedoraproject.org&gt;
Fedora Project Leader