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Full Discussion: Extracting lines after nth LINE from an output
Top Forums Shell Programming and Scripting Extracting lines after nth LINE from an output Post 302627671 by haczyk on Saturday 21st of April 2012 06:55:05 AM
Old 04-21-2012
Code:
# awk ' $1 ~ /^[0-9]/' file
 1      32.3kB  65.5GB  65.5GB  primary  ext3         boot
 2      65.5GB  67.7GB  2147MB  primary  linux-swap
 3      67.7GB  500GB   432GB   primary  ext3
#

Code:
# cat file
Model: ATA WDC WD5000AAKS-0 (scsi)
Disk /dev/sdb: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type     File system  Flags
 1      32.3kB  65.5GB  65.5GB  primary  ext3         boot
 2      65.5GB  67.7GB  2147MB  primary  linux-swap
 3      67.7GB  500GB   432GB   primary  ext3

Information: Don't forget to update /etc/fstab, if necessary.
#

if output came from another command just pipe it to awk

Edit: or use grep:
Code:
# grep '^.[0-9]' file
 1      32.3kB  65.5GB  65.5GB  primary  ext3         boot
 2      65.5GB  67.7GB  2147MB  primary  linux-swap
 3      67.7GB  500GB   432GB   primary  ext3
#

I forgot about sed:

Code:
$ sed -n '/^.[0-9]/p' file
 1      32.3kB  65.5GB  65.5GB  primary  ext3         boot
 2      65.5GB  67.7GB  2147MB  primary  linux-swap
 3      67.7GB  500GB   432GB   primary  ext3
$

Kind regards,
Last edited by haczyk; 04-21-2012 at 08:32 AM.. Reason: Add grep && sed code
This User Gave Thanks to haczyk For This Post:
selvarajvs
 

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LEARN ABOUT CENTOS

extlinux

extlinux(1)						      General Commands Manual						       extlinux(1)

NAME

       extlinux - install the SYSLINUX bootloader on a ext2/ext3 filesystem

SYNOPSIS

       extlinux [options] directory

DESCRIPTION

       EXTLINUX is a new syslinux derivative, which boots from a Linux ext2/ext3 filesystem.  It works the same way as SYSLINUX, with a few slight
       modifications.  It is intended to simplify first-time installation of Linux, and for creation of  rescue  and  other  special-purpose  boot
       disks.

       The  installer is designed to be run on a mounted directory.  For example, if you have an ext2 or ext3 usb key mounted on /mnt, you can run
       the following command:

	      extlinux --install /mnt

OPTIONS

       -H, --heads=#
	      Force the number of heads.

       -i, --install
	      Install over the current bootsector.

       -O, --clear-once
	      Clear the boot-once command.

       -o, --once=command
	      Execute a command once upon boot.

       -M, --menu-save=label
	      Set the label to select as default on the next boot

       -r, --raid
	      Fall back to the next device on boot failure.

       --reset-adv
	      Reset auxiliary data.

       -S, --sectors=#
	      Force the number of sectors per track.

       -U, --update
	      Updates a previous EXTLINUX installation.

       -z, --zip
	      Force zipdrive geometry (-H 64 -S 32).

FILES

       The extlinux configuration file needs to be named extlinux.conf and needs to be stored in the extlinux  installation  directory.  For  more
       information about the contents of extlinux.conf, see syslinux(1) manpage, section files.

BUGS

       I  would  appreciate hearing of any problems you have with SYSLINUX.  I would also like to hear from you if you have successfully used SYS-
       LINUX, especially if you are using it for a distribution.

       If you are reporting problems, please include all possible information about your system and your BIOS; the vast majority of  all  problems
       reported turn out to be BIOS or hardware bugs, and I need as much information as possible in order to diagnose the problems.

       There  is  a  mailing  list  for discussion among SYSLINUX users and for announcements of new and test versions. To join, send a message to
       majordomo@linux.kernel.org with the line:

SEE ALSO

       syslinux(1)

SYSLINUX for ext2/ext3 filesystem				 18 December 2007						       extlinux(1)
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