System Code Geeks Operating System Developers Resource Center

We are living the era of buzzwords, and Docker is for sure one of those in the technological landscape. Docker has a common sense definition: hypervisor-free virtualization. In other terms: running VMs without any hypervisor-based virtualization support. Now, how is this possible? What is the arcane trick to achieving that? Let’s live a short journey to sketch the context out, ...

Many experienced database developers are familiar with user-defined functions implemented in SQL or a procedural language. PostgreSQL itself supports PL/pgSQL, PL/Tcl, PL/Perl, PL/Python, and has third-party support for PL/sh, PL/Java, PL/Ruby, PL/PHP and even PL/R. Recent versions of PostgreSQL also support SQL/MED (foreign data) with foreign data wrappers (FDW). This allows the database user to access foreign data sources – ...

The find command is one of the versatile commands in UNIX and Linux  and I used it a lot in my day to day work. I believe having good knowledge of it and understanding of its different options and usage will increase your productivity a lot in UNIX based operating system e.g. Redhat Linux or Solaris. If you are a QA, support ...

I’m spending my time between Mac OS and Windows, and when I go back to my Windows machine I always feel the lack of my Mac command prompt. Almost a year ago Amir posted how you can get a nice command prompt on a Mac. I’ve always wanted a post like that, but for a Windows machine. Today I stumbled ...

In this post, we feature a comprehensive Linux sed Examples. Sed is basically a stream editor used for modifying files in unix or linux. It provides a nifty way to perform operations on files which can be passed around through pipes. Most people never learn its real power, they just simply use sed to replace text. You can do many ...

In this post, we feature a comprehensive Apache enable SSL / TLS Tutorial. This article is part of our Academy Course titled Apache HTTP Server Tutorial. In this course, we provide a compilation of Apache HTTP Server tutorials that will help you get started with this web server. We cover a wide range of topics, from installing the server and ...

Chef-Solo is an open source tool that runs locally and allows us to provision the guest machine using chef cookbooks without the complication of any chef client and server configuration. In this post, we will learn to execute a simple recipe which will create a file with some content inside /tmp directory using chef cookbook recipe. To start with, we will create ...

In this post, we feature a comprehensive Apache mod_rewrite example. This article is part of our Academy Course titled Apache HTTP Server Tutorial. In this course, we provide a compilation of Apache HTTP Server tutorials that will help you get started with this web server. We cover a wide range of topics, from installing the server and performing a basic ...

When you interact a lot with command line tools, such as : docker , docker-machine and docker-compose, command line completion (using the tab key) is a must. Let’s have a look at how to enable bash completion for those docker command line tools Mac user ? install bash-completion I suppose you already use brew on Mac to install additional packages; ...