operating-systems

I understand that when a page fault occurs in user space (Ring 3), the fault handler can read the saved CS register from pt_regs to confirm CPL=3, then send SIGSEGV to the process and keep the kernel ...

The Arch Linux release engineering team published the May 2026 install media on May 1, 2026. The new ISO ships with Linux kernel 7.0.3 and is available now from the official download mirrors at archlinux.org. As with every monthly Arch release, this build exists strictly for fresh installations. Existing Arch Linux users have nothing to […] The post Arch Linux 2026.05.01 Install Media Is Out, Pow…

As one of a number of users of Windows, I am interested in single-user operating systems, because I think they are fit for microcomputers. For a long time, I thought batch processing operating systems ...

As one of a number of users of Windows, I am interested in single-user operating systems, because I think they are fit for microcomputers. For a long time, I thought batch processing operating systems ...

I have a dedicated Intel J1900 server with 4x2 GHz CPU, 8 GB RAM, and a 750 GB HDD. I would like to partition the server so that it is split in half and run Debian on each partition. On each instance, ...

Chapter 13 of OSTEP provides a primer on how and why modern operating systems abstract physical hardware. This is part of our series going through OSTEP book chapters. The OSTEP textbook is freely available at Remzi's website if you like to follow along. Multiprogramming and Time Sharing In the early days of computing, machines didn't provide much of a memory abstraction to users. The operating s…

The FreeBSD Project has announced the release of FreeBSD 15.0-BETA3, the third beta build in the 15.0-RELEASE cycle. The update brings several critical fixes, improved WiFi compatibility, and expanded image availability for VMs, containers, and cloud platforms. FreeBSD 15.0-BETA3 introduces a series of refinements and security updates aimed at improving system stability and hardware support. […] …

Zorin OS 18 has officially arrived with a major redesign, improved performance, and deep Windows integration, positioning itself as the most refined alternative for millions of PCs left behind after Windows 10’s end of life. Zorin Group has released Zorin OS 18, a long-term support (LTS) version backed through June 2029, marking one of the […] The post Zorin OS 18 Launches as a Major Redesign and…

The FreeBSD Project has shipped the fifth alpha build for the upcoming 15.0-RELEASE, delivering a crucial fix for a power management regression. The update reverts a change that caused USB ports to be nonfunctional after a system resumed from S3 sleep. This release pushes the first beta back by one week, but the team remains […] The post FreeBSD 15.0 Alpha 5 Arrives With Critical USB Sleep Fix, K…

If you are here to know about Unix-based Operating Systems, then you are in the right place. Unix has a long history as an operating system. Actually, it is more appropriate if we call it an OS family rather than a single OS. Because, although it was built for internal usage at the AT&T Bell […] The post 10 Unix-Based Operating Systems That Aren’t Linux appeared first on UbuntuPIT .

Here’s why there isn’t a 128-bit operating system. There are mainly 32-bit and 64-bit operating systems, but what about 128-bit operating systems? So if you want to learn why there aren’t 128-bit operating systems, then you’re in the right place. Keep reading! What About Bits and Operating Systems? Currently, there are 32-bit and 64-bit processors, ... Read more The post 128-Bit Operating Systems…

The efficiency of Operating Systems (OSes) has always been in the spotlight of systems researchers, ever since the seminal Dijkstra’s THE multiprogramming system in early 60s. But the reason for this obsession is not entirely obvious. While the OS is commonly perceived as a layer between applications and hardware, such a view is somewhat misleading […]