From the discussion I see that I misunderstood your initial posting. But I am as confused as kennethk is.

What I think so far:

• you have a file with a lot of lines
• you want to match several lines and join them into one
• the lines you want to match build a consecutive range (e.g. lines 5-11)
• the range of lines you want to match starts with a line containing the string "remotely"
• the range of lines you want match ends with a line containing the string "p_agrs"

Based upon that, I guessed this code:

#! /usr/bin/perl
use strict;
use warnings;


# open file and read from that handle...
while ( <DATA> ) {
    chomp;
    print if m/remotely/ ... m/p_agrs/;
    print $/ if m/p_agrs/;
}

__DATA__
not me
foo remotely
bar01
bar02
bar03
p_agrs
i am not here
foo2 remotely
barbar01
p_agrs
i am out...
[download]

result:

foo remotelybar01bar02bar03p_agrs
foo2 remotelybarbar01p_agrs
[download]

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