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Full Discussion: Swapping or switching 2 lines using sed
Top Forums Shell Programming and Scripting Swapping or switching 2 lines using sed Post 302247117 by summer_cherry on Wednesday 15th of October 2008 03:07:22 AM
Old 10-15-2008
hi

I think below perl script can help you a little.

Code:
$file=shift;
$l1=shift;
$l2=shift;
open FH,"<$file";
while(<FH>){
	$arr[$.]=$_;
}
close FH;
for($i=1;$i<=$#arr;$i++){
	if($i==$l1){
		print $arr[$l2];
	}
	else{
		if ($i==$l2){
			print $arr[$l1];
		}
		else{
			print $arr[$i];
		}
	}
}


Below sed script can not adress your question flexbily, but should throw some light on that.
Code:
1
2
5
4
3
6

Code:
1
2
3
4
5
6

Code:
sed -n '/5/ !{
p
}
/5/ {
h
n
G
x
n
G
p
}'

Last edited by summer_cherry; 10-15-2008 at 04:19 AM..
 

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LEARN ABOUT DEBIAN

dtc_setup_vps_disk

dtc_setup_vps_disks(8)					      System Manager's Manual					    dtc_setup_vps_disks(8)

NAME

       dtc_setup_disk - setup LVM disks for using it as a VM

SYNOPSIS

       dtc_setup_vps_disk.sh VPS_NUMBER HDD_SIZE SWAP_SIZE [ lvm|loopback ]

DESCRIPTION

       dtc_setup_vps_disk.sh This shell script is a part of the dtc-xen package that is to be used by the dtc panel to manage a Xen VPS server.

       This script is used to create partitions to be used by a VPS later on.  It will create a normal partition that will be used as a root disk,
       and a swap partition.

       dtc_setup_disk is to be used by the dtc-xen SOAP server, but can also be used as a standalone userland tool.

       If the partition(s) exists, then this script will delete it/them first.

OPTIONS

       VPS_NUMBER has to be a number between 01 and 19. Let's say the number is 16, and that dtc-xen is configured to use the volume group  called
       lvm1, then this script will create /dev/lvm1/xen16 and /dev/lvm1/xen16swap.

       HDD_SIZE Size in MB of the VPS partition to create.

       SWAP_SIZE  Size in MB of the VPS swap partition to create. If the dtc-xen SOAP server is used to create the VPS, then it will create a swap
       partition of the exact same size as the memory.

       IMAGE_TYPE This parameter can have 2 values: either lvm or loopback. If ommited, then lvm is used. If lvm is used, then	this  script  will
       create a partition using lvmcreate, otherwise it will create an image file. Both will later be used for the VPS.

EXAMPLE

       dtc_setup_vps_disk 04 15360 256 lvm

       This will create 2 LVM partition to be used by the VPS named xen04, the first one being a root partition of 15 GB, and the second one being
       a swap partition of 256 MB.

VERSION

       This documentation describes dtc_setup_vps_disk version 0.3.15.	See http://www.gplhost.com/software-dtc-xen.html for updates.

SEE ALSO

       dtc_reinstall_os(8), dtc_kill_vps_disk(8)

															    dtc_setup_vps_disks(8)
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