A Little About Shebang in Linux
Shebang is the #! sequence at the beginning of an executable file that tells the system which program should interpret this script📝.
Linux
All posts under tag "Linux"
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Linux command line, archiving and compression: tar, gzip, bzip2, xz, zstd, zip, 7z, and rar commands
In this article, we will study ways to archive and compress files in Linux systems. I will explain how to use the utilities from the article title.
Configuring DNS over HTTPS (DoH) on OpenWrt
In this short guide, I will explain how to configure name resolution (DNS) over the encrypted HTTPS protocol, also known as DNS over HTTPS (DoH), on a router running OpenWrt.
SSH - Port Forwarding: Local and Reverse Tunnels
Today we will look at port forwarding through SSH🔐: how to use local and reverse tunnels to organize access to local and remote services.
Connecting OpenWrt to an OpenConnect Server
In this article we will configure OpenWrt to connect to an OpenConnect server (ocserv) and set up flexible routing: all traffic, only specific domains, or specific IP subnets.
Bash: An Example of Optimizing Filtering Commands with grep and awk
I will tell you about a task I solved the other day🧑💻 I slightly changed the input data, but the essence remains the same. There are two CSV files: 📄ping_status.csv contains diagnostic information about host availability by ping.
Bash: Features of Arithmetic Operations - Increment ((expression++))
When testing the host availability check script I mentioned last time, I encountered an interesting Bash feature when performing arithmetic operations💪.
Obsidian — a progressive note-taking tool for PC and smartphone
In this note I'll talk about an application for keeping and structuring notes — Obsidian. We'll install and configure it, connect several plugins: for quickly saving pages from the browser and Telegram posts. We'll also set up cloud sync, so notes are available on all your devices.
Bash: Writing a Universal Host Availability Check Script
Today we'll write a useful Bash script🧑💻 that performs various host availability checks on the network🌐. As an example, I'll show how to check connectivity using the `ping` utility🏓 and run a traceroute when it's lost⚡.