Compressing PNG images on Linux

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PNG is short for Portable Network Graphic, a type of image file. It’s particularly popular file type with web designers and widely used on websites to display high-quality digital images because it can handle graphics with transparent or semi-transparent backgrounds. PNG files, which use the .png extension, can handle 16 million colors - which definitely sets them apart from most file types.

Understanding OAuth 2.0 and how it works

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OAuth is an open authorization protocol, which allows accessing the resources of the resource owner by enabling the client applications on HTTP services such as Google, Facebook, Twitter, GitHub, BitBucket, and a long etc... It allows sharing of resources stored on one site to another site without using user credentials. Username and password tokens are used instead. The access to the resource can be limited by defined and approved scope.

Conventional commits

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The Conventional Commits specification is a lightweight convention on top of commit messages. It provides an easy set of rules for creating an explicit commit history; which makes it easier to write automated tools on top of.

The commit message should be structured as follows:

<type>[optional scope]: <description>

[optional body]

[optional footer]

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Decimal, binary and hex representations

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When working with any kind of digital system in which numbers are being represented, it is important to understand the different ways numbers are represented in these systems.

In electronics, almost without fail, numbers are represented by two voltage levels which can represent a one or a zero. The number system based on ones and zeroes is called the binary system: because there are only two possible digits. In HTML programming, colors can be represented by a 6-digit hexadecimal number: FFFFFF represents white whereas 000000 represents black.