Commands & Shells Archives - Igor Oseledko

Coronavirus Stats in Bash

Igor — Thu, 19 Mar 2026 08:00:48 +0000

Originally published March 19, 2020 @ 10:37 pmThe result of my morbid fascination with the coronavirus situation is this quick bash script that parses Johns Hopkins University coronavirus data to generate a quick report for the current date for the specified countries. The plan is to add some statistical analysis to spot potential anomalies in […]

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Updating Lynis

Igor — Sat, 28 Feb 2026 02:22:08 +0000

Originally published February 29, 2020 @ 5:04 pmLynis is an excellent security audit tool for Linux and various Unix derivatives. I have a small wrapper script that runs Lynis via a cron job, does a selective diff with the previous run’s output, and sends me an email. Unfortunately, Lynis does not update itself automatically and […]

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Converting Geofency Data to Google Maps

Igor — Sat, 07 Feb 2026 17:25:10 +0000

Originally published February 8, 2023 @ 8:57 amGeofency is a time and location tracking app for iOS. I’ve been using it for many years to keep track of my whereabouts. At times, this information can come in quite handy. The app does not track your movements continuously. Instead, it uses Geofencing and iBeacon technology, which […]

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Reading Multi-Line Input in One Loop Iteration

Igor — Sat, 31 Jan 2026 23:45:24 +0000

Originally published February 1, 2023 @ 2:43 pmBash loops can read the input as words or lines, but what if you needed to accept multi-line input with a single loop iteration? In the following simple example, we randomly select a hundred lines from /var/log/messages and count the number of characters in each line: shuf -n […]

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Convert Code Snippets to PNG

Igor — Sat, 24 Jan 2026 23:09:46 +0000

Originally published January 26, 2020 @ 2:50 pmOn occasion I find myself struggling posting code on discussion forums that don’t handle code formatting all that well. What would’ve helped is some quick and easy way to convert code to an image file with syntax highlighting. And so here it is. The first step is to […]

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Linux Blog Directory

Igor — Tue, 13 Jan 2026 17:25:56 +0000

Originally published January 15, 2020 @ 7:29 amA curated list of Linux and Unix blogs from around the world. IgorExperienced Unix/Linux System Administrator with 20-year background in Systems Analysis, Problem Resolution and Engineering Application Support in a large distributed Unix and Windows server environment. Strong problem determination skills. Good knowledge of networking, remote diagnostic techniques, […]

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Fuzzy Search with Linux

Igor — Tue, 25 Nov 2025 05:59:24 +0000

Originally published November 25, 2022 @ 11:01 pmThis is a quick look at several handy utilities that will allow you to find, navigate, and edit directories and files easily. This overview includes such tools as fzf, rg, fd-find, bat, and the fzf.vim plugin for VIM. The fzf is a general-purpose command-line fuzzy finder. . The […]

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Appending Filenames

Igor — Sun, 16 Nov 2025 00:00:16 +0000

Originally published November 17, 2019 @ 11:39 amIf you google how to append, say, current timestamp to the filename in Bash, almost every suggestion boils down to something really basic along the lines of mv $somefile $somefile_$(date +'Y%-%m-%d'). Technically, this is correct and, yet, this is not what was needed. Most filenames have extensions that […]

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Renaming Files with exiftool, Part II

Igor — Tue, 21 Oct 2025 20:55:54 +0000

Originally published October 22, 2022 @ 1:42 pmIn the first part of this article, I went over the details of a process for renaming photos to include the geographic location in the filename. Some people asked if the same can be done for videos, and the answer is “probably.” Earlier this year, I went on […]

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Dealing with GitHub Desktop

Igor — Mon, 13 Oct 2025 17:41:17 +0000

Originally published October 14, 2022 @ 10:12 amGitHub Desktop is one of those terrible applications that I still have to use occasionally, much to my regret. I can’t tell you if a five-year-old or a cat coded it, but this application with relatively straightforward functionality has more bugs than Florida. Sometime in the spring of […]

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