Open-source is software with its source code made available with a license in which the copyright holder provides the rights to change and distribute the software freely. In open source operating systems, the complete source code is freely available and anyone can make changes and create their own environment as necessary. These open source OS are advantageous as anyone with better ideas can develop it out of the existing OS and distribute freely. These software have good reliability, stability, auditability, flexibility and more over it is economically feasible.
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Distro Astro is a Linux distribution based on Ubuntu/Linux Mint which aims to cover the requirements of astronomers and astronomy enthusiasts. If you’re an astronomer or a beginner in astronomy, this is the perfect package you will find that is very useful to an astronomer. Distro Astro offers a range of features for both beginners and professionals including observatories and planetariums to astrophotography and data analysis.
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The vi/vim editor is arguably one of the most powerful text editors! But working with vi requires the usage of many commands. One of the first things we learnt in school was “A for Apple, B for Ball, C for Cat…”. It is time to relearn that if we have to work on vi! Now what we need to remember is “A for Append, B for Begin, C for Change…”. This is a fun article that helps you relearn A-Z!

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Every running program (process) occupies some memory for its code and data. Linux follows a particular methodology for assigning memory addresses to various parts of a program. Linux assigns a “segment” to each of the following, where a segment can be defined as a single memory block of variable size:
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