Thomas Hikade thikade

Linux NetFilter, IP Tables and Conntrack Diagrams

IPTABLES TABLES and CHAINS

IPTables has the following 4 built-in tables.

1) Filter Table

Filter is default table for iptables. So, if you don’t define you own table, you’ll be using filter table. Iptables’s filter table has the following built-in chains.

Squashing Git Commits

The easy and flexible way

This method avoids merge conflicts if you have periodically pulled master into your branch. It also gives you the opportunity to squash into more than 1 commit, or to re-arrange your code into completely different commits (e.g. if you ended up working on three different features but the commits were not consecutive).

Note: You cannot use this method if you intend to open a pull request to merge your feature branch. This method requires committing directly to master.

Switch to the master branch and make sure you are up to date:

Don't use VPN services.

No, seriously, don't. You're probably reading this because you've asked what VPN service to use, and this is the answer.

Note: The content in this post does not apply to using VPN for their intended purpose; that is, as a virtual private (internal) network. It only applies to using it as a glorified proxy, which is what every third-party "VPN provider" does.

A Russian translation of this article can be found here, contributed by Timur Demin.
A Turkish translation can be found here, contributed by agyild.
There's also this article about VPN services, which is honestly better written (and has more cat pictures!) than my article.

Create a backend service that simply serves the pod name, and a frontend haproxy instance that balances based on client cookies.

# This is the backend service
apiVersion: v1
kind: Service
metadata:
  name: hostname
  annotations:
    # Enable sticky-ness on "SERVERID"
    serviceloadbalancer/lb.cookie-sticky-session: "true"

Change apiVersion from:
```
- apiVersion: v1
```
(or apiVersion: apps.openshift.io/v1)

to:

	import javax.crypto.Cipher;
	import java.security.NoSuchAlgorithmException;

	public class KeyLengthDetector {
	public static void main(String[] args) {
	int allowedKeyLength = 0;

	try {
	allowedKeyLength = Cipher.getMaxAllowedKeyLength("AES");
	} catch (NoSuchAlgorithmException e) {

	Here are all the classes from Bootstrap 3 (version 3.1.1).

	Method of extraction:

	1. Download Bootstrap 3 and rename bootstrap.css as "bootstrap.html"
	2. Add the following 24 lines of code to the very bottom of the bootstrap.html file:

	<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
	<script src="http://cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.min.js"></script>
	<script>

	#To Decrypt Jenkins Password from credentials.xml
	#<username>jenkins</username>
	#<passphrase>your-sercret-hash-S0SKVKUuFfUfrY3UhhUC3J</passphrase>


	#go to the jenkins url
	http://jenkins-host/script

	#In the console paste the script
	hashed_pw='your-sercret-hash-S0SKVKUuFfUfrY3UhhUC3J'

	import jenkins.model.*

	def matchedJobs = Jenkins.instance.items.findAll { job ->
	job.name =~ /my_regex_here/
	}

	matchedJobs.each { job ->
	println job.name
	//job.delete()
	}

	// Example showing how to patch Kubernetes resources.
	package main

	import (
	"encoding/json"
	"fmt"

	"k8s.io/apimachinery/pkg/runtime/schema"
	types "k8s.io/apimachinery/pkg/types"
	"k8s.io/client-go/dynamic"