"..parsing a text file and creating a CSV file.."

of course, if you are creating a CSV file, you will have to look into module Text::CSV or Text::CSV_XS. Hence, davido's important comment.
However, for "Flat File", data you posted the following should still work: 

use warnings;
use strict;

my %data_config;
my $key;
while (<DATA>) {
    chomp;
    if (/(.+?):$/) {
        $key = $1;
    }
    else {
        push @{ $data_config{$key} }, $_; # {updated}
    }
}

print "Host, OS, Version, Hot Fixes, Features\n";
for ( 'Host', 'Kernel', 'Version', 'Hot fixes', 'Enabled Features' ) {
    print "@{$data_config{$_}}, ";
}

__DATA__
Host:
NetDevice1234
Kernel:
Linux 2.6.18-164.11
Version:
Driver 23.4.1 333.0
Hotfix BLD Edition

Hot fixes:
   HF372590
   HF372804
   HF372864
Enabled Features:
FTP 
HTTP
SMTP
Active Directory

[download]
Output:
Host, OS, Version, Hot Fixes, Features
NetDevice1234, Linux 2.6.18-164.11, Driver 23.4.1 333.0 Hotfix BLD Edi
+tion ,    HF372590    HF372804    HF372864, FTP  HTTP SMTP Active Dir
+ectory,

[download]

Update:
Thanks Tux, $key was intended, instead of $1 used in this line push .... It has been corrected.

If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me

In reply to Re: Simple parse of text file to csv by 2teez
in thread Simple parse of text file to csv by OodaLoop

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