Shell Programming and Scripting

here is my prob ..

i have a very large text files and i need to locate specific lines, copy them and then replace a single word in the replaced text

example

find all lines that contain '/etc', copy the line immediately below (not at the end of the file) and then replace '/etc' with '/root' in the new line

old text:
rsync --delete -avpz xxx.xxx.xxx.xxx:/var /usr/backup/123 > /usr/backup.log
rsync --delete -avpz xxx.xxx.xxx.xxx:/usr/local/etc /usr/backup/123/loc > /usr/backup.log
rsync --delete -avpz xxx.xxx.xxx.xxx:/etc /usr/backup/123 > /usr/backup.log

new:
rsync --delete -avpz xxx.xxx.xxx.xxx:/var /usr/backup/123 > /usr/backup.log
rsync --delete -avpz xxx.xxx.xxx.xxx:/usr/local/etc /usr/backup/123/loc > /usr/backup.log
rsync --delete -avpz xxx.xxx.xxx.xxx:/etc /usr/backup/123 > /usr/backup.log
rsync --delete -avpz xxx.xxx.xxx.xxx:/root /usr/backup/123 > /usr/backup.log

i hope my request for help is not too convoluted .. thank you so much in advance!!!


j

Hi, You may try perl:

#! /usr/bin/perl

Code:

open FH,"<a.txt";
@arr=<FH>;
map {tr/\n//d} @arr;
for($i=0;$i<=$#arr;$i++){
	print $arr[$i],"\n";
	if ($arr[$i]=~m/etc/){
		print $arr[$i+1],"\n" if ($i+1 <= $#arr);
		$arr[$i+1]=~s/etc/root/ if ($i != $#arr);	
	}
}
close FH;