Re: which is the best command to use
于 2012-1-4 19:26, Wilko Fokken 写道: On Tue, Dec 27, 2011 at 08:57:55PM +0800, lina wrote: Hi, I have two questions, wish to get advice, Question 1: For a series of files: cat a_*.o* | grep WARNING some file like a_1.o12 has WARNING, but others does not have WARNING How can I let grep returns the filename? try grep -H in order to get the filename. Maybe you can try $ grep -lR WARNING /pathname -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/4f068bd4.70...@gmail.com
Re: which is the best command to use
On Tue, Dec 27, 2011 at 08:57:55PM +0800, lina wrote: Hi, I have two questions, wish to get advice, Question 1: For a series of files: cat a_*.o* | grep WARNING some file like a_1.o12 has WARNING, but others does not have WARNING How can I let grep returns the filename? try grep -H in order to get the filename. -- Wilko FokkenEducation is a man's going Landschaftspolder 67from cocksure ignorance D-26831 Bunde to thoughtful uncertainty. Tel. 04953-9219882 -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20120104112626.gb8...@fok01.laje.edewe.de
Re: which is the best command to use
On Tue, 27 Dec 2011 14:20:02 +0100, lina scribbled:
On Tuesday 27,December,2011 08:57 PM, lina wrote:
Hi,
I have two questions, wish to get advice,
Question 1:
For a series of files:
cat a_*.o* | grep WARNING
some file like a_1.o12 has WARNING, but others does not have WARNING
How can I let grep returns the filename?
I wrote a very-low-level and not-work-as-expected one,
#!/bin/sh
for filename in *.o*
do
#echo $filename
a= cat $filename | grep WARNING
if [ a ]
then
echo $filename
fi
done
Please give me some advice,
Best regards,
Question 2:
ls . | xargs -i -t cp ./{} {}.bak
How does xargs work,
I checked google, :
-i : replace the string
-t print
but still lack well understanding,
how those xargs organise things,
and
$ ls .
a.txt b.txt
above will give a.txt.bak b.txt.bak
ls | xargs -i cp ./{} {basename {}.bak} definitely not work,
Sorry I send it to debian list, I asked on another bash list, for two
days the second question, no one replied. I have much more faith in
this list.
WIth all the best regards,
From man grep ...
-l, --files-with-matches
Suppress normal output; instead print the name of each input
file from which output would normally have been printed. The
scanning will stop on the first match. (-l is specified by
POSIX.)
so
$ grep -l *.o*
or
$ grep --file-with-matches *.o*
should do what you want.
--
@
Bill Dennen ieee1...@hotmail.com
Of all the things I've lost, I miss my mind the most ...
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Re: which is the best command to use
On Tuesday 27,December,2011 08:57 PM, lina wrote:
Hi,
I have two questions, wish to get advice,
Question 1:
For a series of files:
cat a_*.o* | grep WARNING
some file like a_1.o12 has WARNING, but others does not have WARNING
How can I let grep returns the filename?
I wrote a very-low-level and not-work-as-expected one,
#!/bin/sh
for filename in *.o*
do
#echo $filename
a= cat $filename | grep WARNING
if [ a ]
then
echo $filename
fi
done
Please give me some advice,
Best regards,
Question 2:
ls . | xargs -i -t cp ./{} {}.bak
How does xargs work,
I checked google, :
-i : replace the string
-t print
but still lack well understanding,
how those xargs organise things,
and
$ ls .
a.txt b.txt
above will give a.txt.bak b.txt.bak
ls | xargs -i cp ./{} {basename {}.bak}
definitely not work,
Sorry I send it to debian list, I asked on another bash list, for two
days the second question, no one replied. I have much more faith in
this list.
WIth all the best regards,
--
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Re: which is the best command to use
On Tue, 27 Dec 2011 14:20:02 +0100, lina scribbled:
On Tuesday 27,December,2011 08:57 PM, lina wrote:
Hi,
I have two questions, wish to get advice,
Question 1:
For a series of files:
cat a_*.o* | grep WARNING
some file like a_1.o12 has WARNING, but others does not have WARNING
How can I let grep returns the filename?
I wrote a very-low-level and not-work-as-expected one,
#!/bin/sh
for filename in *.o*
do
#echo $filename
a= cat $filename | grep WARNING
if [ a ]
then
echo $filename
fi
done
Please give me some advice,
Best regards,
Question 2:
ls . | xargs -i -t cp ./{} {}.bak
How does xargs work,
I checked google, :
-i : replace the string
-t print
but still lack well understanding,
how those xargs organise things,
and
$ ls .
a.txt b.txt
above will give a.txt.bak b.txt.bak
ls | xargs -i cp ./{} {basename {}.bak} definitely not work,
Sorry I send it to debian list, I asked on another bash list, for two
days the second question, no one replied. I have much more faith in
this list.
WIth all the best regards,
whoops, my bad (so focused on the -l)
its
$ grep -l WARNING *.o*
:(
--
@
Bill Dennen ieee1...@hotmail.com
Of all the things I've lost, I miss my mind the most ...
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Re: which is the best command to use
On Tuesday 27,December,2011 09:51 PM, Tony Baldwin wrote: On Tue, Dec 27, 2011 at 09:11:45PM +0800, lina wrote: On Tuesday 27,December,2011 08:57 PM, lina wrote: Hi, I have two questions, wish to get advice, Question 1: For a series of files: cat a_*.o* | grep WARNING some file like a_1.o12 has WARNING, but others does not have WARNING How can I let grep returns the filename? I wrote a very-low-level and not-work-as-expected one, #!/bin/sh for filename in *.o* do #echo $filename a= cat $filename | grep WARNING if [ a ] then echo $filename fi done for filename in *.o*; do if [ grep WARNING ]; then echo $filename fi done Thanks, $ ./return_error_filename.sh ./return_error_filename.sh: line 6: [: grep: unary operator expected $ cat return_error_filename.sh #!/bin/sh for filename in *.o* do if [ grep WARNING ]; then echo $filename fi done ./tony -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/4ef9d1ce.2000...@gmail.com
Re: which is the best command to use
On Tue, Dec 27, 2011 at 01:19:20PM GMT, Andrei Popescu wrote: To answer the question in your subject I think the correct command to use is 'man' :) Well put, sir! +1 ;^) Regards, -- Raf -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20111227140350.gb32...@linuxstuff.pl
Re: which is the best command to use
On Tuesday 27,December,2011 09:19 PM, Andrei Popescu wrote: On Ma, 27 dec 11, 20:57:55, lina wrote: Hi, I have two questions, wish to get advice, Question 1: For a series of files: cat a_*.o* | grep WARNING Useless use of 'cat' (grep can open files) some file like a_1.o12 has WARNING, but others does not have WARNING How can I let grep returns the filename? From your explanation it's not clear to me if you want -l or -H, but you might just read 'man grep' and decide for yourself ;) Not familiar with xargs, but you should probably read that manpage too. To answer the question in your subject I think the correct command to use is 'man' :) Kind regards, Andrei I didn't realize I could find answer from manuals of grep. Thanks, -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/4ef9c84d.1090...@gmail.com
Re: which is the best command to use
On Tue, Dec 27, 2011 at 12:57:55PM GMT, lina wrote:
Hi,
I have two questions, wish to get advice,
Question 1:
For a series of files:
cat a_*.o* | grep WARNING
It's one of the useless uses of cat[0].
Use:
% grep WARNING a_*.o*
instead.
some file like a_1.o12 has WARNING, but others does not have WARNING
How can I let grep returns the filename?
% man grep
-l, --files-with-matches
Suppress normal output; instead print the name of each input file
from which output would normally have been printed. The scanning
will stop on the first match. (-l is specified by POSIX.)
Question 2:
ls . | xargs -i -t cp ./{} {}.bak
How does xargs work,
I checked google, :
Maybe it's time to start checking man instead ;^)
% man xargs
-i : replace the string
--replace[=replace-str]
-i[replace-str]
This option is a synonym for -Ireplace-str if replace-str is
specified, and for -I{} otherwise.
This option is deprecated; use -I instead.
-t print
--verbose
-t
Print the command line on the standard error output before
executing it.
but still lack well understanding,
it's quite self explanatory ;^)
how those xargs organise things,
and
$ ls .
a.txt b.txt
above will give a.txt.bak b.txt.bak
ls | xargs -i cp ./{} {basename {}.bak}
definitely not work,
How about:
% ls | xargs -I '{}' cp '{}' '{}'.bak
BTW, if you're only after copying the files with .bak appended to the
copied file name, this should suffice.
for i in `ls` ; do cp $i $i.bak ; done
There are other ways to do it as well.
Sorry I send it to debian list, I asked on another bash list, for
two days the second question, no one replied. I have much more faith
in this list.
Good to hear that, but maybe you should start to reading more and
test a bit yourself before you write an email. It'll definitely be less
than two days to find a solution and sometimes it'll take less time to
find it in the manual than to write an email.
I appreciate the fact that you're a beginner but your problems are
NOT Debian-specific and ARE trivial to resolve so maybe it's time
to learn how to look for solutions yourself rather than others holding
your hand all the time, eh? ;^)
[0] http://partmaps.org/era/unix/award.html
All the best.
--
Raf
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Re: which is the best command to use
On Ma, 27 dec 11, 20:57:55, lina wrote: Hi, I have two questions, wish to get advice, Question 1: For a series of files: cat a_*.o* | grep WARNING Useless use of 'cat' (grep can open files) some file like a_1.o12 has WARNING, but others does not have WARNING How can I let grep returns the filename? From your explanation it's not clear to me if you want -l or -H, but you might just read 'man grep' and decide for yourself ;) Not familiar with xargs, but you should probably read that manpage too. To answer the question in your subject I think the correct command to use is 'man' :) Kind regards, Andrei -- Offtopic discussions among Debian users and developers: http://lists.alioth.debian.org/mailman/listinfo/d-community-offtopic signature.asc Description: Digital signature
which is the best command to use
Hi,
I have two questions, wish to get advice,
Question 1:
For a series of files:
cat a_*.o* | grep WARNING
some file like a_1.o12 has WARNING, but others does not have WARNING
How can I let grep returns the filename?
Question 2:
ls . | xargs -i -t cp ./{} {}.bak
How does xargs work,
I checked google, :
-i : replace the string
-t print
but still lack well understanding,
how those xargs organise things,
and
$ ls .
a.txt b.txt
above will give a.txt.bak b.txt.bak
ls | xargs -i cp ./{} {basename {}.bak}
definitely not work,
Sorry I send it to debian list, I asked on another bash list, for two
days the second question, no one replied. I have much more faith in this
list.
WIth all the best regards,
--
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with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Archive: http://lists.debian.org/4ef9c0d3@gmail.com
Re: which is the best command to use
On Tue, Dec 27, 2011 at 09:11:45PM +0800, lina wrote: On Tuesday 27,December,2011 08:57 PM, lina wrote: Hi, I have two questions, wish to get advice, Question 1: For a series of files: cat a_*.o* | grep WARNING some file like a_1.o12 has WARNING, but others does not have WARNING How can I let grep returns the filename? I wrote a very-low-level and not-work-as-expected one, #!/bin/sh for filename in *.o* do #echo $filename a= cat $filename | grep WARNING if [ a ] then echo $filename fi done for filename in *.o*; do if [ grep WARNING ]; then echo $filename fi done ./tony -- http://www.tonybaldwin.net All Tony, all the time! -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20111227135124.ga26...@deathstar.hsd1.ct.comcast.net
RE: which is the best command to use
well, I have two files: File_a.txt a a a File_b.txt b b b I wish to get a file_ab.txt as a b a b a b man 1 paste Regards,Arno
Re: which is the best command to use
You can use paste, and/or join. for you particular example paste -d ' ' a.txt b.txt ab.txt will work Regards -- Roman On Fri, Dec 23, 2011 at 12:07 PM, Arno Schuring aelschur...@hotmail.comwrote: well, I have two files: File_a.txt a a a File_b.txt b b b I wish to get a file_ab.txt as a b a b a b man 1 paste Regards, Arno
Re: which is the best command to use
On Fri, Dec 23, 2011 at 4:13 PM, Roman Khomasuridze khomasuri...@gmail.com wrote: You can use paste, and/or join. for you particular example paste -d ' ' a.txt b.txt ab.txt will work Thanks cool. a derived question, for a.txt: 1 a 2 a 3 a for b.txt 1 b 2 b 3 b what if I only interested the 2 filed. namely a b a b a b I tried use paste -d ' ' a.txt b.txt | awk 'print $2, $4' are there some other way of doing it? No doubt it's a very smart list, I wasted 1 hour writing some not sound python script, it's a bunch of files anyway. Thanks again, Regards -- Roman On Fri, Dec 23, 2011 at 12:07 PM, Arno Schuring aelschur...@hotmail.com wrote: well, I have two files: File_a.txt a a a File_b.txt b b b I wish to get a file_ab.txt as a b a b a b man 1 paste Regards, Arno -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/CAG9cJmmgssfdcPJqtMD+uBzf0hUff+j+EtTcg2b203DEj=o...@mail.gmail.com
Re: which is the best command to use
* lina (2011-12-23): [...] File_a.txt a a a File_b.txt b b b I wish to get a file_ab.txt as a b a b a b apt-get install coreutils paste File_a.txt File_b.txt -André -- L'art d'ennuyer est de tout dire. [Voltaire] -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20111223081216.ga87...@albedo.lan
Re: which is the best command to use
lina lina.lastn...@gmail.com wrote: Thanks cool. a derived question, for a.txt: 1 a 2 a 3 a for b.txt 1 b 2 b 3 b what if I only interested the 2 filed. namely a b a b a b Are the 1, 2, 3 relevant? So if you had this, what would you expect as your output - a.txt 1 a 2 b 3 c b.txt 1 d 2 e 3 f I tried use paste -d ' ' a.txt b.txt | awk 'print $2, $4' are there some other way of doing it? That's good if the numeric column is irrelevant. You could use cut instead of awk, but it gets you much the same result. (You could replace the paste and the awk with a single instance of perl, but frankly I wouldn't make the effort for this kind of situation.) Chris -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/ah2es8x6sr@news.roaima.co.uk
which is the best command to use
Hi, (How are you all?) well, I have two files: File_a.txt a a a File_b.txt b b b I wish to get a file_ab.txt as a b a b a b I tried, but still don't know which is the best way to do it, Thanks ahead and wish all have a nice holiday, Best regards, -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/CAG9cJmmcJsfXQrhcRZugB27G=uz9rhhrhjajey-fc3fmku2...@mail.gmail.com
