Glossary on Raven's Blog | Linux and IT

System Log in Linux: Syslog and Journald

Fri, 07 Mar 2025 00:00:00 +0000

Greetings!

Today, a theoretical note🗒️. Let’s talk about the system log in Linux, find out who syslog and journald are, and how they differ + briefly about their advantages and disadvantages. It’ll be informative😉.

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Terminal Multiplexer

Mon, 18 Nov 2024 00:00:00 +0000

Greetings!

Today in the Linux user’s glossary 🐧 terminal multiplexer — a tool that is very often used in the process of administering Linux systems 🧑‍💻. As usual, we’ll give a definition of the term, talk about popular implementations of terminal multiplexers, and of course about their advantages and disadvantages🧐.

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Configuration Management System

Mon, 28 Oct 2024 00:00:00 +0000

Greetings!

Today in the Linux user’s glossary🐧 the term is — configuration management systems. As per tradition, we’ll give a definition of the term, find out what types exist and popular implementations of such systems. And of course briefly about the advantages and disadvantages🧐.

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What Are Monitoring Systems in IT?

Wed, 18 Sep 2024 00:00:00 +0000

Greetings!

In this note we’ll talk about what types of monitoring systems exist, and as usual, we’ll look at their most popular implementations today. This is an important topic, so don’t be lazy and read it — it won’t take much time 😉.

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VPN — Technology for Ensuring Secure Network Interaction

Tue, 16 Apr 2024 00:00:00 +0000

Greetings!

(a theoretical note preceding an article on deploying a VPN server)

Today we’ll break down the concept of a virtual private network, better known as VPN. What it is, what types exist, and we’ll also talk a bit about popular implementations of this network technology.

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Containerization — OS-Level Virtualization Technology

Fri, 01 Mar 2024 00:00:00 +0000

Greetings!

Today in the Linux user’s glossary, a popular term nowadays — containerization. What it is, what implementations exist, and briefly about the advantages and disadvantages.

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LAMP/LEMP — Server Software Stack for Working with Web Applications

Thu, 14 Sep 2023 00:00:00 +0000

Greetings!

Today a new term is added to our Linux user’s glossary — LAMP or LEMP server.

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Hypervisor — Virtualization Software

Thu, 15 Jun 2023 00:00:00 +0000

Greetings!

Today our Linux user’s glossary grows with a fairly popular term today — hypervisor.

Let’s hear what Wikipedia has to say on this topic:

A hypervisor, or virtual machine monitor, or low-level shell, is a program or hardware scheme that provides or allows the simultaneous, parallel execution of multiple operating systems on the same host computer. The hypervisor also provides isolation of operating systems from each other, protection and security, resource sharing between different running OSes, and resource management.

POSIX (Portable Operating System Interface)

Wed, 24 May 2023 00:00:00 +0000

Greetings!

We continue growing the Linux user’s glossary. Today we’ll talk about the term POSIX.

Wikipedia gives the following definition of this term:

POSIX (Portable Operating System Interface) is a set of standards describing the interfaces between the operating system and an application program (system API), the C language library, and a set of applications and their interfaces. The standard was created to ensure compatibility between various UNIX-like operating systems and portability of application programs at the source code level, but it can also be used for non-Unix systems.

GTK and Qt Frameworks

Thu, 15 Sep 2022 00:00:00 +0000

Greetings!

Most of the applications existing today for the GNU/Linux OS are written using the GTK and Qt graphical libraries.

For example, desktop environment applications of GNOME (and its derivatives) are written using the GTK framework. GNOME is used in the following popular Linux distributions: Ubuntu, Fedora, Linux Mint, Debian, and others.

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Init System

Fri, 29 Apr 2022 00:00:00 +0000

Greetings!

Do you know what happens to a computer after you press the power button? In the case of operating systems based on Linux, after the computer is started with the physical switch, specific systems are launched in a certain order.

An approximate startup algorithm for a GNU/Linux OS with a graphical interface:

PLAINTEXT

Computer start --> BIOS/UEFI --> OS bootloader --> Linux kernel --> Init system --> Desktop

Click to expand and view more

Today let’s talk a bit about init systems in Linux. The following systems are actively used today:

Unix Operating System

Sun, 20 Feb 2022 00:00:00 +0000

Greetings!

The Unix operating system is considered one of the most important in the history of computer OS development. The ideas embedded in this system during its development remain relevant and are regularly used today.

For example:

the principles of how the file system works;
the file hierarchy;
the “Everything is a file” concept;
multitasking;
multi-user sessions;
the broad functionality of the command shell;
and much more.

Historical hierarchy of Unix OS and Unix-like systems:

Virtual Machine

Sat, 12 Feb 2022 00:00:00 +0000

Greetings!

I looked at a clear example of implementing virtualization technology and working with a virtual machine in the guide Try Linux right in Windows. I recommend taking a look 😉

👨‍💻And…

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Desktop Environment

Sat, 05 Feb 2022 00:00:00 +0000

Greetings!

Here are a few screenshots of desktops:

Archcraft, Linux Mint, MX Linux, CutefishOS, KDE Neon, Windows 10, Arch Linux

Terminal Emulator

Sat, 29 Jan 2022 00:00:00 +0000

Greetings!

Recently I wrote a note about such an operating system management tool as the command interpreter, access to which, in modern operating systems, can be obtained using a graphical program — a terminal emulator.

Here are a few screenshots of what it can look like in Linux and Windows:

Software Repository

Sat, 22 Jan 2022 00:00:00 +0000

Greetings!

There are various types of repositories. For example, repositories of programs written in a single programming language, or intended for a specific platform. The latter includes repositories of Linux and other *nix systems. Repositories are also actively used in version control systems, for example in git systems.

In the Linux world, repositories are usually divided into two types: officially maintained by the developers of a specific system (distribution), and user (third-party) repositories, connected manually.

Command Interpreter or Shell

Wed, 05 Jan 2022 00:00:00 +0000

Greetings!

I’m sure many are familiar with the command line in Windows systems — cmd.exe, as well as its more modern variation — Power shell. These programs are command shells.

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Linux Distribution

Tue, 05 Oct 2021 00:00:00 +0000

Greetings!

There is a great multitude of Linux distributions. Such a number is primarily due to the philosophy and principles of open software, which I wrote about earlier.

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Proprietary or Closed Software

Sat, 25 Sep 2021 00:00:00 +0000

Greetings!

A vivid example of such software is the Windows operating system. Its source code is closed, protected by copyright, and this OS is distributed under a commercial license. The terms of use are usually described in detail in a multi-page user agreement (which nobody reads) before installation.

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Open Source Software

Sun, 19 Sep 2021 00:00:00 +0000

Greetings!

Open software, or software with open source code, also known as Open source, is a term that has been appearing more and more often on internet resource pages lately. This concept emerged, if my memory serves correctly, around the end of the 90s.

Photo by: viarami

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