jrelo

seq 3189 3193 > x.txt ; seq 5003 5008 > y.txt; while read -r x && read -r y <&3; do echo number wat${x}.hostgator.com wat${y}.hostgator.com ;done <x.txt 3<y.txt

jrelo

/usr/sbin/conntrack -L |grep $1 | grep ESTAB |grep 'dport=$2' | awk '{ system("/usr/sbin/conntrack -D --orig-src '$1' --orig-dst " substr($6,5) " -p tcp --orig-port-src " substr($7,7) " --orig-port-dst $2");}';

jrelo

iptables -t mangle -N badz
iptables -t mangle -N blockz
iptables -t mangle -A PREROUTING -p tcp -m tcp --dport 80 -j blockz
iptables -t mangle -A badz -m recent --set --name terrible --rsource
iptables -t mangle -A blockz -p tcp -m tcp --dport 80 --tcp-flags FIN,SYN,RST,ACK SYN -m recent --update --seconds 3600 --name terrible --rsource -j DROP
iptables -t mangle -A blockz -p tcp -m tcp --dport 80 -m string --string "malicious_string" --algo bm --to 65535 -m recent --set --name bad --rsource
iptables -t mangle -A blockz -p tcp -m tcp --dport 80 -m string --string "malicious_string" --algo bm --to 65535 -m recent --update --seconds 10 --hitcount 3 --name bad --rsource -j badz

jrelo

#!/bin/bash
# Set the variable for bash behavior
shopt -s nullglob
shopt -s dotglob
 
# Die if dir name provided on command line
[[ $# -eq 0 ]] && { echo "Usage: $0 dir-name"; exit 1; }
 
# Check for empty files using arrays 
chk_files=(${1}/*)

jrelo

# cpapi2 --user=tqqlzfna AddonDomain addaddondomain dir=/home/tqqlzfna/public_html/whatever.com newdomain=watever.com subdomain=wat
# /scripts/addpop test@watever.com apassword...
# mail -s "Test Subject" test@watever.com < /dev/null

jrelo

#!/usr/bin/perl

use strict;
use warnings;

unless (scalar @ARGV == 1) {
    die "Parameter needed, please pass ctid as parameter";
}

my $ctid = $ARGV[0];

jrelo

#!/usr/bin/python3

import os.path, re
from collections import namedtuple

MountInfo = namedtuple('MountInfo', ['mountid', 'parentid', 'devid', 'root', 'mountpoint', 'mountoptions', 'extra', 'fstype', 'source', 'fsoptions'])

mounts = {}

def unescape(string):

jrelo

This is what I tell people to do, who ask me "how do I learn to be a Linux sysadmin?".

1) Set up a KVM hypervisor.
2) Inside of that KVM hypervisor, install a Spacewalk server.
  - Use CentOS 6 as the distro for all work below.
  - For bonus points set up errata importation on the CentOS channels, so you can properly see security update advisory information.
3) Create a VM to provide named and dhcpd service to your entire environment.
  - Set up the dhcp daemon to use the Spacewalk server as the pxeboot machine (thus allowing you to use Cobbler to do unattended OS installs).
  - Make sure that every forward zone you create has a reverse zone associated with it.
  - Use something like "internal.virtnet" (but not ".local") as your internal DNS zone.

jrelo

coproc cat                    # Start cat in background
echo Hello >&${COPROC[1]}     # Say "Hello" to cat
read LINE <&${COPROC[0]}      # Read response
echo $LINE                    # cat replied "Hello"!

jrelo

#!/usr/bin/env perl
use strict;
use warnings;
use Zabbix::Tiny;
$|++;
my %hostgroups = (
	'Test' => "42",
);
my $zabbix = Zabbix::Tiny->new(
	server => 'https://myzabbix.something.com/api_jsonrpc.php',