icy

System-call method

Use Bash to expand the brace. If you don't like this, you may look at more professional way at https://gist.github.com/ewoodh2o/3829405 This method invokes a system call to ask Bash to expand.

FIXME: This is not secure!!!

class String

icy

#!/bin/bash

# Purpose:
#   See how nginx loads/includes its configuration files
#   Very useful to detect quickly where there errors come from.
# Author : Anh K. Huynh
# Date   : 2015 Aug 14th
# License: MIT
# Notes  : 
#   Some system has a different level. Here it's 3.

tomasinouk

Some examples of SNAT, DNAT with iptables with comments

mainly used in start-up script

How to test 'safely'

When we play with iptables aka firewall we might end up in situation, where we execute rule, which has unforseen impact - lock yourself out. Recovering from this situation is necessity.

How to:

• Enable reboot via SMS.
• Test all commands in shell first before putting them into Start-up script. This way the command will be wiped out, when unit is rebooted.

masquarade all outgoing packets to be WLAN0 IP

joech4n

Fixed by @williamtsoi1 at: https://gist.github.com/williamtsoi1/104531c65852a852399a3dc1096a2dcc

sciurius

#!/usr/bin/perl -w
# Key generation for BTsync.

# Author          : Johan Vromans
# Created On      : Sun Apr 27 20:31:57 2014
# Last Modified By: Johan Vromans
# Last Modified On: Fri May  2 15:37:24 2014
# Update Count    : 47
# Status          : Unknown, Use with caution!

btsync-secret

#!/bin/sh
#/ Usage: btsync-secret [option]...
#/ A Bittorrent Sync Secret Generator
set -e

h_flag=false
v_flag=false
e_flag=false
n_flag=false
c_flag=false

pkuczynski

MIT License

Copyright (c) 2014 Piotr Kuczynski

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWAR

schnell18

#!/bin/sh
# script to automate the creation of chroot jail
# w/ minimal executables to run git

export CHROOT=/var/chroot

function copy_binary() {
    for i in $(ldd $*|grep -v dynamic|cut -d " " -f 3|sed 's/://'|sort|uniq)
      do
        cp --parents $i $CHROOT

miketheman

Adding 2 nodes to an existing 3-node ZooKeeper ensemble without losing the Quorum

Since many deployments may start out with 3 nodes and so little is known about how to grow a cluster from 3 memebrs to 5 members without losing the existing Quorum, here is an example of how this might be achieved.

In this example, all 5 nodes will be running on the same Vagrant host for the purpose of illustration, running on distinct configurations (ports and data directories) without the actual load of clients.

YMMV. Caveat usufructuarius.

Step 1: Have a healthy 3-node ensemble

kntyskw

#!/bin/sh

VIP=$1
IF=$2

# Determine the interface's MAC address
MAC=`ip link show $IF | awk '/ether/ {print $2}'`

# Determine ENI ID of the interface
ENI_ID=`curl http://169.254.169.254/latest/meta-data/network/interfaces/macs/$MAC/interface-id`