linuxaudio.org

On Thu, Jun 23, 2011 at 7:53 AM, Ralf Mardorf

 wrote:

quoted text
> $ 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

quoted text
> 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

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