Ubuntu's Message Of The Day or MOTD is the name given to the welcome screen users see when they login to a Ubuntu server using a remote terminal. On the surface the output looks like it is sourced from a basic text file but it is a collection of modular shell scripts being executed. In this entry… Continue reading Add to and change Ubuntu’s MOTD
In this entry I will guide you to update the standard terminal editor used by Ubuntu from its classic 2009 revision to its latest release.
The other day I was toying around with HTTP2 support and Jetty 9.3 on my Ubuntu Server 14.04 VM install. I had mostly followed the helpful instructions in the Jetty: The Definitive Reference on setting up the application as a web server with support for http, https, deploy modules. But whenever I tried to implement… Continue reading Jetty 9.3 HTTP2 dependency issue with Ubuntu 14.04
Introduction In this guide I will walk through the process of hardening HTTPS connectors used by Apache Tomcat. As unfortunately the default configuration of Ubuntu 14.04 LTS using Tomcat 7 and OpenJDK 7 are vulnerable to a number of attacks and weak encryptions. You can test your own site’s HTTPS implementation against these weaknesses at… Continue reading Secure and harden Apache Tomcat’s SSL/TLS
This entry will guide through the process of creating a self-signed certificate to use on an Apache Tomcat 7 or 8 HTTPS connector. Self-signed certificates allow secure, encrypted HTTPS connections but are not certified by any trusted certificate authority. So first time client connections will receive all kinds of warnings from their web browser. Because of… Continue reading Create self-signed certificates for HTTPS with Apache Tomcat
tar is a feature rich but often confusing archiving tool most commonly used on Linux and BSD systems. One of the great benefits of tar over other more modern tools such as 7z, RAR or ZIP is that it is open source, free and platform agnostic. Even more importantly for Linux users tar archives preserve… Continue reading Helpers and common usage for tar
rsync is a widely used tool for synchronisation so to keep copies of a file on multiple computers the same. Because of its flexibility it has become the defacto standard on Linux and other similar systems. While newer protocols and tools such as Dropbox and BitTorrent Sync overlap with and improve on some of rsync’s… Continue reading Rsync – Helpers and common usage