BASH: arrays and hashmaps

Sometimes there is a need to use in BASH such structures as lists (also known as arrays) and dictionaries (also known as hashmaps and associative arrays). In this post there are some samples how to work with them.
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Python: How to easily write a CLI tool for Linux using Fire

I want to share the easiest way I know to write a CLI tool for Linux administration using python and Fire.
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Nginx: Sample Configuration Files

Sometimes there is a need to quickly create an nginx configuration file: for hosting a static website, for proxying requests to upstream server, etc.

This article provides simple examples of Nginx configs for different purposes.

Linux: How to set up monitoring with alerts to Telegram

This article describes how to set up monitoring with alerts to Telegram using Grafana, Prometheus, Alertmanager, Node-exporter and Cadvisor.
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Linux: how to limit /var/log folder size

Sometimes the /var/log folder grows so large that it causes a shortage of disk space. How to limit the size of this folder? By following the two steps in this article, you can control the size of the /var/log folder.
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Linux: How to create LVM logical volume

This article describes how to create an LVM group and volume for a physical disk in the Linux operating system.
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Linux: How to extend LVM volume

This article describes how to expand an LVM group and volume on a Linux operating system.
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Python: How to load multiple web pages in parallel

This article describes how to load the content of multiple web pages from multiple urls in parallel with python.
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Ubuntu: How to upgrade kernel

This article describes how to upgrade Linux kernel on Ubuntu operating system via command line interface.
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