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Full Discussion: sed - extract a group of Letters/numbers
Top Forums UNIX for Dummies Questions & Answers sed - extract a group of Letters/numbers Post 302858567 by newbie2010 on Monday 30th of September 2013 11:23:53 PM
Old 10-01-2013
sed - extract a group of Letters/numbers
I have a file with hundreds of lines in it. I wanted to extract anything that matches the following:

KR followed by 4 digits:
example KR1201

Code:
cat list | sed "s/[KR[0-9$]//g"

Is the closest I've come, and obviously it is not what I want. This would remove all of the items that I want and leave me with the rest of the text. I've tried sed -n and /p' but this doesn't work and I'm confused about the syntax. I know other ways to do this with egrep and grep -w but I want to learn to do it in sed.

The one thing I don't want to do is print the rest of the line; I want only to print the KR1201 or KR followed by 4 digits. There is something missing in my syntax; not sure how to encapsulate the pattern.
 

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LEARN ABOUT DEBIAN

ift-extract

I2M19058(1)							     GNU Info							       I2M19058(1)

NAME

       ift-extract.info - ift-extract.info

Built-in iSight firmware extractor and patcher
       ift-extract extract the Built-in iSight firmware from Apple driver and patch it to avoid some bugs in it. The firmware is then ready to get
       loaded into the chip using ift-load.

       * Menu:

       Finding the Apple driver: see "Driver"

       Command line options: see "Options"

       See also "Copying"

   1 Finding the Apple driver
       ift-extract extract Built-in iSight firmware from Apple iSight driver.  This driver is located at
       /System/Library/Extensions/IOUSBFamily.kext/Contents/PlugIns/AppleUSBVideoSupport.kext/Contents/MacOS/AppleUSBVideoSupport on your Mac OS X
       root partition.

       There is several version of this driver depending on driver version or host architecture (PowerPC or x86). Thus, ift-extract must determine
       know the variant of the driver in order to properly extract the firmware.

       Any AppleUSBVideoSupport file starting with those shipped with iMac G5 iSight must work. If not, please report unknown AppleUSBVideoSupport
       at bugreport mail address with machine type and OS X version.

   2 Command line options
       `-a' `--apple-driver' Apple driver filename where to extract the firmware.

       `-d' `--output-directory' The directory where to output the firmware. Defaults to /lib/firmware.

       `-f' `--output-filename' The output firmware name. Defaults to isight.fw

       `-?'  `--help' Shows option help and quit.

       Since ift-extract defaults to output the firmware to /lib/firmware/isight.fw, ensure you have the right to do so.

   3 Copying
       isight-firmware-tools is a project developped by A~Xtienne Bersac based on the work of Ronald S. Bultje, Johannes Berg and Ivan N. Zlatev.

       This manual has been written by A~Xtienne Bersac.

       Copyright (C) 2007 A~Xtienne Bersac <bersace@gmail.com>

perl v5.14.2							    2012-01-09							       I2M19058(1)
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