A few years ago, when I started to be a system administrator / DevOps engineer  I installed some package on a CentOS 7 system and I wanted to find out where all files were installed. I questioned myself if there is a way to ask the package manager where the package was installed. After some […]

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The ‘$’ character is used for parameter expansion, command substitution, or arithmetic expansion. It is very useful if you want to manipulate the values of variables without using some other external command like sed, awk, python etc. In this article you will learn more about how to use parameter expansion in Bash. First of all, is important […]

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Docker is awesome! Nowadays containers are everywhere. From startups to huge companies, everyone uses it more or less. On the other hand, WordPress is one of the most popular Content Management Systems (CMS) due to the fact is user-friendly, is flexible and has tons of nice features. There are lots of freelancers worldwide developing themes, […]

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Let’s Encrypt is a free and open certificate authority (CA) provided by Internet Security Research Group (ISRG). The main purpose of this organization is to offer free digital certificates in order to enable HTTPS on your website. They fight for a more secure and privacy-respecting Web, and this is one of the reasons they offer certificates […]

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