ISO8583 financial transaction message format

  • 23 August 2017
  • ADM

Introduction to ISO8583 financial transaction message format. Parts: message type indicator, one or more bitmaps and data elements.


How to parse Google Search result in Java

  • 26 May 2017
  • ADM

How to parse Google Search result in Java using URLConnection and a regular expression to parse the response. Can be used to check the Google SERP position.


How to connect to MySQL with JDBC driver

  • 20 May 2016
  • ADM

How to connect to MySQL database with MySQL JDBC driver. Get a new connection using DriverManager class.


Change ssh default port in Linux

  • 20 May 2016
  • ADM

By default, ssh listens for incoming connections on port 22. So if a hacker wants to attack your machine he will most likely scan port 22 first. Just to make an idea how important is this (from my point of view of course), before changing the default ssh port for my server I got every day 1000+ login tries for my root user. An effective (but minimal) method to protect your machine is to run ssh on non-standard port. Any unused port will work but one above 1024 is preferable.