23 Jun
2011
23 Jun
'11
1:34 p.m.
On Thu, Jun 23, 2011 at 1:17 AM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
$ cat config-2.6.39.1 | grep PREEMPT
Sorry, but every time I see something like this I'm reminded of the
"Useless Uses of Cat" awards:
http://partmaps.org/era/unix/award.html
--Steve
23 Jun
23 Jun
2:46 p.m.
New subject: How to post selected contend of a configuration file Was: OT - Re: Kernel 2.6.39 Re: Linux-audio-user Digest, Vol 52, Issue 33
On Thu, 2011-06-23 at 06:34 -0500, S C Rigler wrote:
On Thu, Jun 23, 2011 at 1:17 AM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
Hi Steve :)
for me this is the easiest way to post the contend I wished to post,
just because I don't know another way to do it.
How is it done in a better way?
Of cause, opening a door with a key is better than doing it with a
cheque card, if the key is on hand.
Regards,
Ralf
$ cat config-2.6.39.1 | grep PREEMPT
Sorry, but every time I see something like this I'm reminded of the
"Useless Uses of Cat" awards:
http://partmaps.org/era/unix/award.html
--Steve 
2:51 p.m.
New subject: How to post selected contend of a configuration file Was: OT - Re: Kernel 2.6.39 Re: Linux-audio-user Digest, Vol 52, Issue 33
On 06/23/2011 02:46 PM, Ralf Mardorf wrote:
How is it done in a better way?
grep PREEMPT /boot/config-2.6.33-31-realtime
grep --help
Usage: grep [OPTION]... PATTERN [FILE]...
Best,
Jeremy
3:01 p.m.
New subject: How to post selected contend of a configuration file Was: OT - Re: Kernel 2.6.39 Re: Linux-audio-user Digest, Vol 52, Issue 33
On Thu, Jun 23, 2011 at 7:46 AM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
On Thu, 2011-06-23 at 06:34 -0500, S C Rigler wrote:
Since being berated for my own "useless uses of cat" I've made it a
personal goal to condense my command line usage to the shortest, most
elegant form possible.
But anyways, "grep PREEMPT config-2.6.39.1" will give you the same
results, spare precious CPU cycles for audio, and reduce the risk of
developing RSI.
--Steve
On Thu, Jun 23, 2011 at 1:17 AM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
Hi Steve :)
for me this is the easiest way to post the contend I wished to post,
just because I don't know another way to do it.
How is it done in a better way?
Of cause, opening a door with a key is better than doing it with a
cheque card, if the key is on hand.
Regards,
Ralf
$ cat config-2.6.39.1 | grep PREEMPT
Sorry, but every time I see something like this I'm reminded of the
"Useless Uses of Cat" awards:
http://partmaps.org/era/unix/award.html
--Steve
3:39 p.m.
New subject: How to post selected contend of a configuration file Was: OT - Re: Kernel 2.6.39 Re: Linux-audio-user Digest, Vol 52, Issue 33
On Thu, 2011-06-23 at 08:01 -0500, S C Rigler wrote:
On Thu, Jun 23, 2011 at 7:46 AM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
Ok, so it's really better, but your link didn't give this information,
resp. I didn't see it. Thank you.
On Thu, 2011-06-23 at 06:34 -0500, S C Rigler
wrote:
Since being berated for my own "useless uses of cat" I've made it a
personal goal to condense my command line usage to the shortest, most
elegant form possible.
But anyways, "grep PREEMPT config-2.6.39.1" will give you the same
results, spare precious CPU cycles for audio, and reduce the risk of
developing RSI.
--Steve On Thu, Jun 23, 2011 at 1:17 AM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
Hi Steve :)
for me this is the easiest way to post the contend I wished to post,
just because I don't know another way to do it.
How is it done in a better way?
Of cause, opening a door with a key is better than doing it with a
cheque card, if the key is on hand.
Regards,
Ralf
$ cat config-2.6.39.1 | grep PREEMPT
Sorry, but every time I see something like this I'm reminded of the
"Useless Uses of Cat" awards:
http://partmaps.org/era/unix/award.html
--Steve
3:24 p.m.
New subject: How to post selected contend of a configuration file Was: OT - Re: Kernel 2.6.39 Re: Linux-audio-user Digest, Vol 52, Issue 33
On Thu, 2011-06-23 at 14:46 +0200, Ralf Mardorf wrote:
On Thu, 2011-06-23 at 06:34 -0500, S C Rigler wrote:
$ less config-2.6.39.1 | grep PREEMPT
CONFIG_TREE_PREEMPT_RCU=y
CONFIG_PREEMPT_RCU=y
CONFIG_PREEMPT_NOTIFIERS=y
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
CONFIG_PREEMPT=y
Is this better? Any thing that will replace 'grep'?
*?*
Really! Is there any valid reason not to use 'cat' to communicate the
wanted information? I didn't know the command 'less', but here it seems
not to make any difference. Could there be any advantages for me not
using cat?
I'm not kidding! I wonder if there is any difference!
On Thu, Jun 23, 2011 at 1:17 AM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
Hi Steve :)
for me this is the easiest way to post the contend I wished to post,
just because I don't know another way to do it.
How is it done in a better way?
Of cause, opening a door with a key is better than doing it with a
cheque card, if the key is on hand.
Regards,
Ralf $ cat config-2.6.39.1 | grep PREEMPT
Sorry, but every time I see something like this I'm reminded of the
"Useless Uses of Cat" awards:
http://partmaps.org/era/unix/award.html
--Steve 
3:33 p.m.
New subject: How to post selected contend of a configuration file Was: OT - Re: Kernel 2.6.39 Re: Linux-audio-user Digest, Vol 52, Issue 33
----- "Ralf Mardorf" <ralf.mardorf(a)alice-dsl.net> wrote:
$ less config-2.6.39.1 | grep PREEMPT
CONFIG_TREE_PREEMPT_RCU=y
CONFIG_PREEMPT_RCU=y
CONFIG_PREEMPT_NOTIFIERS=y
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
CONFIG_PREEMPT=y
Is this better? Any thing that will replace 'grep'?
*?*
Really! Is there any valid reason not to use 'cat' to communicate the
wanted information? I didn't know the command 'less', but here it
seems
not to make any difference. Could there be any advantages for me not
using cat?
I'm not kidding! I wonder if there is any difference!
cat /dev/random
less /dev/random
see what happens
"less config-2.6.39.1 | grep PREEMPT" is
better said as "grep PREEMPT config-2.6.39.1" as already
mentioned.
3:53 p.m.
New subject: How to post selected contend of a configuration file Was: OT - Re: Kernel 2.6.39 Re: Linux-audio-user Digest, Vol 52, Issue 33
On Thu, Jun 23, 2011 at 7:53 AM, Ralf Mardorf
<ralf.mardorf(a)alice-dsl.net> wrote:
$ less config-2.6.39.1 | grep PREEMPT
CONFIG_TREE_PREEMPT_RCU=y
CONFIG_PREEMPT_RCU=y
CONFIG_PREEMPT_NOTIFIERS=y
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
CONFIG_PREEMPT=y
Is this better? Any thing that will replace 'grep'?
Grep is fully capably capable of matching lines directly from the file
so you don't need anything piping the file to it. You would only need
to use "less" in this context if you expected the number of matches
from "grep" to exceed your console size and wanted to page through
them ("grep PREEMPT /boot/config* | less").
Could there be any advantages for me not
using cat?
You probably won't notice on simple one-liners, but it's bad practice
and will lead to bad scripting. If you write a script with a bunch of
useless "cat's" in it you will notice a *significant* performance hit
when compared to a script that properly uses shell built-ins, etc.
--Steve
6:01 p.m.
New subject: How to post selected contend of a configuration file Was: OT - Re: Kernel 2.6.39 Re: Linux-audio-user Digest, Vol 52, Issue 33
2011/6/23 S C Rigler <riglersc(a)gmail.com>om>:
...
Grep is fully capably capable of matching lines directly from the file
so you don't need anything piping the file to it. ...
Now, what if the file is compressed ?
There is
bzless config.tar.bz2 | grep PREEMT*
would that somehow work pipeless ?
$ less config-2.6.39.1 | grep PREEMPT
It's also possible with the angle bracket
<config.txt grep PREEMT*
BUT: I really would NOT recommend that.
If you accidentally reverse the bracket (>), you've lost....
--
E.R.
6:58 p.m.
New subject: How to post selected contend of a configuration file Was: OT - Re: Kernel 2.6.39 Re: Linux-audio-user Digest, Vol 52, Issue 33
On Thu, 23 Jun 2011 18:00:57 +0200, Emanuel Rumpf wrote
So why do you even mention it?
But the most important point is: _don't_ use 'less' on places other than
the end of a pipe! Less is a pager whose task is to pretty-print streams
so they are human readable. Less _does_ possible modify the stream. I'll
escape transmogrify certain control characters. If you try to use zless/grep
to search for a control sequence you might be up for a surprise ...
Cheers, RalfD
2011/6/23 S C Rigler <riglersc(a)gmail.com>om>:
bzgrep?
...
Grep is fully capably capable of matching lines directly from the file
so you don't need anything piping the file to it. ...
Now, what if the file is compressed ?
There is
bzless config.tar.bz2 | grep PREEMT*
would that somehow work pipeless ? $ less
config-2.6.39.1 | grep PREEMPT
It's also possible with the angle bracket
<config.txt grep PREEMT*
BUT: I really would NOT recommend that.
If you accidentally reverse the bracket (>), you've lost.... --
E.R.
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--
R. Mattes -
Hochschule fuer Musik Freiburg
rm(a)inm.mh-freiburg.de
7:13 p.m.
New subject: How to post selected contend of a configuration file Was: OT - Re: Kernel 2.6.39 Re: Linux-audio-user Digest, Vol 52, Issue 33
On Thu, Jun 23, 2011 at 11:58 AM, R. Mattes <rm(a)mh-freiburg.de> wrote:
On Thu, 23 Jun 2011 18:00:57 +0200, Emanuel Rumpf
wrote
The correct answer is neither since both grep or bzgrep will simply
state that "Binary file matches". Why would anyone tar and then
compress a single text file anyways?
I apologize for the tangent, this is getting way OT.
--Steve
2011/6/23 S C Rigler <riglersc(a)gmail.com>om>:
bzgrep?
...
Grep is fully capably capable of matching lines directly from the file
so you don't need anything piping the file to it. ...
Now, what if the file is compressed ?
There is
bzless config.tar.bz2 | grep PREEMT*
would that somehow work pipeless ?
7:23 p.m.
New subject: How to post selected contend of a configuration file Was: OT - Re: Kernel 2.6.39 Re: Linux-audio-user Digest, Vol 52, Issue 33
2011/6/23 R. Mattes <rm(a)mh-freiburg.de>de>:
Ah. Thank you.
would that somehow work pipeless ?
bzgrep?
... _don't_ use 'less' on places other
than the end of a pipe!
.. less _does_ possible modify the stream.
I see.
--
E.R.
4904
days inactive
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days old
linux-audio-user@lists.linuxaudio.org
11 comments
6 participants
participants (6)
-
Cedric Roux -
Emanuel Rumpf -
Jeremy Jongepier -
R. Mattes -
Ralf Mardorf -
S C Rigler