# Xen Xen is an open-source Type 1 (bare-metal) hypervisor that allows multiple operating systems to run simultaneously on one physical machine. This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles. ## Linux Foundation Newsletter: September 2026 DevFeed: [Linux Foundation Newsletter: September 2026]() Original publisher: [Read original article]() Author: andrewb@proximabiz.com (The Linux Foundation) Published: 2026-09-17T14:49:43Z Content type: news Language: en Sources: [Linux Foundation - Blog]() Topics: [linux foundation](), [MCP](), [Artificial Intelligence](), [Open Source](), [Xen](), [opensearch](), [Cybersecurity]() Tags: [2026](), [blog](), [careers](), [cybersecurity](), [education](), [lf-europe](), [lf-events](), [lf-research](), [linux](), [linux-blog](), [linux-foundation](), [mcp](), [newsletter](), [open-source](), [open-source-summit](), [opensearch](), [project-news](), [projects](), [september-2026](), [tech-talent]() ### AI overview The September 2026 Linux Foundation Newsletter highlights upcoming AGNTCon and MCPCon North America, developments in agentic AI and AI-agent infrastructure, Xen safety and security work, OpenSearch recognition, and LF Energy research, projects, and community updates. ### Source excerpt Welcome to the September 2026 edition of the Linux Foundation Newsletter The open agentic AI community is coming together in San Jose for AGNTCon + MCPCon North America, October 22-23. More than 3,500 developers, researchers, maintainers and technical leaders will gather for 150 sessions across 11 tracks focused on MCP, agent infrastructure, security, interoperability and production agent systems. Register by October 8 to save. Beyond the event, six developments stand out this month. TheAgentic AI Foundation welcomed the Gates Foundation as its first philanthropic member, bringing the perspectives of underserved communities into the development of agentic AI and supporting broader participation in the firstMCP Dev Summit Nairobi. The Linux Foundation welcomed TRACE, an open specification developed with AMD, Anthropic, Intel, Microsoft, NVIDIA, OPAQUE and TII to provide portable, verifiable runtime and compliance evidence for AI agents and confidential workloads. TheXen Project launched the Xen Safety Committee to develop shared engineering artifacts for functional safety certification and extended security coverage for Xen releases to five years.OpenSearch won the Analytics & Data Intelligence Solutions category in SiliconANGLE's2026 TechForward Awards as the project celebrates five years of community growth. NewLF Energy research found that open source software can deliver two to five times greater net value for grid operators and introduced a standardized framework for evaluating those investments. LF Energy also welcomed three new members and three new projects, advanced Power Grid Model to Early Adoption after more than 10 million downloads, and documented how TenneT achieved a tenfold improvement in grid security analysis performance with PowSyBl. You'll also find new Linux Foundation research, training and certification opportunities, registration for upcoming events, and project news spanning cloud native, AI, energy, cybersecurity, automotive, telecommunicat ## Why open source firmware is important for security DevFeed: [Why open source firmware is important for security]() Original publisher: [Read original article]() Published: 2019-05-08T15:09:26Z Content type: article Language: en Sources: [Jessie Frazelle]() Topics: [Open Source](), [Security](), [UEFI](), [Kernel](), [Xen](), [cpu](), [intel](), [x86]() Tags: [cpu](), [firmware](), [intel](), [kernel](), [open-source](), [operating-systems](), [security](), [uefi](), [x86](), [xen]() ### AI overview The article explains why open-source firmware matters for security. It examines privilege levels below the operating-system kernel, focusing on SMM and UEFI at Ring -2 and Intel Management Engine at Ring -3, where proprietary code has extensive system privileges and limited visibility. ### Source excerpt I gave a talk recently at GoTo Chicago on Why open source firmware is important and I thought it would be nice to also write a blog post with my findings. This post will focus on why open source firmware is important for security. Privilege Levels In your typical "stack" today you have the various levels of privileges. Ring 3 - Userspace: has the least amount of privileges, short of there being a sandbox in userspace that is restricted further. Ring 0 - Kernel: The operating system kernel, for open source operating systems you get visibility into the code behind this. Ring -1 - Hypervisor: The virtual machine monitor (VMM) that creates and runs virtual machines. For open source hypervisors like Xen, KVM, bhyve, etc you have visibility into the code behind this. Ring -2 - System Management Mode (SMM), UEFI kernel: Proprietary code, more on this below. Ring -3 - Management Engine: Proprietary code, more on this below. The negative rings were made up because there was no other way to express something with more privileges. From the above, it's pretty clear that for Rings -1 to 3, we have the option to use open source software and have a large amount of visibility and control over the software we run. For the privilege levels under Ring -1, we have less control but it is getting better with the open source firmware community and projects. It's counter-intuitive that the code that we have the least visibility into has the most privileges. This is what open source firmware is aiming to fix. Ring -2: SMM, UEFI kernel This ring controls all CPU resources. System management mode (SMM) is invisible to the rest of the stack on top of it. It has half a kernel. It was originally used for power management and system hardware control. It holds a lot of the proprietary designed code and is a place for vendors to add new proprietary features. It handles system events like memory or chipset errors as well as a bunch of other logic. The UEFI Kernel is extremely complex. It has million ## Xen - Podstawowe polecenia DevFeed: [Xen - Podstawowe polecenia]() Original publisher: [Read original article]() Author: Tom Published: 2012-06-19T00:00:00Z Content type: tutorial Language: pl Sources: [Tomasz Gągor]() Topics: [Xen](), [LVM]() Tags: [bridge](), [create](), [delete](), [domain](), [example](), [gateway](), [howto](), [image](), [ip](), [lvm](), [memory](), [os](), [power](), [tools](), [uptime](), [xen]() ### AI overview A Polish tutorial explains basic Xen commands for creating and deleting virtual machines and for managing their lifecycle, including listing, starting, shutting down, resetting, restarting, pausing, and monitoring resource usage. It also demonstrates Xen configuration involving LVM volumes and network settings. ### Source excerpt Pisałem już HOWTO o konfiguracji Xen'a ale nie opisałem jak się bawić wirtualkami gdy Xen'a już mamy. To nadrabiam. Tworzenie i usuwanie maszyn wirtualnych Do tworzenia/niszczenia DomU wykorzystuję pakiet xen-tools dostarczający m.in. dwa narzędzia: xen-create - dla którego przygotowałem dość skomplikowaną konfigurację przy okazji wcześniejszego posta: Instalacja i konfiguracja DomU external link . Przykład użycia: xen-create --hostname example-domu --ip 10.0.0.77 \ --gateway 10.0.0.1 --broadcast 10.0.0.255 --netmask 255.255.255.0 \ --bridge br10 --vcpus 2 --memory=2G xen-delete-image - narzędzie do kasowania wirtualnych maszyn. Maszyna musi być wyłączona aby można było ją usunąć. Narzędzie to kasuje plik konfiguracyjny maszyny wirtualnej oraz przydzielone jej volumeny lvm. Przykład użycia: xen-delete-image nazwamaszyny Zarządzanie maszynami wirtualnymi Do uruchamiania, wyłączanie, resetowania (i ogólnie zarządzania) maszynami wirtualnymi służy tylko jedno polecenie: xm z różnymi parametrami: ## Xen - ustawienie autostartu DomU DevFeed: [Xen - ustawienie autostartu DomU]() Original publisher: [Read original article]() Author: Tom Published: 2012-02-27T00:00:00Z Content type: tutorial Language: pl Sources: [Tomasz Gągor]() Topics: [Xen]() Tags: [xen]() ### AI overview This short tutorial explains how to configure selected Xen DomU systems to start automatically after the hypervisor restarts by creating /etc/xen/auto and linking their configuration files there. ### Source excerpt Aby wybrane systemy DomU startowały automatycznie po restarcie hypervisora należy podlinkować ich pliki konfiguracyjne w katalogu /etc/xen/auto po uprzednim jego utworzeniu. Przykładowo: mkdir /etc/xen/auto ln -s /etc/xen/example.cfg /etc/xen/auto/example.cfg Od teraz DomU example będzie startować automatycznie. ## Xen na Squeeze - Instalowanie i konfiguracja hostów gości (DomU) DevFeed: [Xen na Squeeze - Instalowanie i konfiguracja hostów gości (DomU)]() Original publisher: [Read original article]() Author: Tom Published: 2012-02-24T00:00:00Z Content type: tutorial Language: pl Sources: [Tomasz Gągor]() Topics: [Xen](), [LVM](), [Ext4](), [Kernel](), [XFS](), [apt]() Tags: [apt](), [debian](), [ext4](), [kernel](), [lvm](), [virtual](), [volume](), [xen](), [xfs]() ### AI overview A Polish tutorial explains how to install and configure Xen guest domains (DomU) on Debian Squeeze using xen-tools. It covers default settings, LVM-backed virtual machine disks, snapshots, networking, filesystem choices, independent kernels, and pygrub limitations with XFS. ### Source excerpt Ostatnio pisałem o konfiguracji Dom0 external link - dzisiaj napiszę o uruchamianiu DomU. Do instalacji DomU wykorzystuję skrypty z pakietu xen-tools, można go zainstalować poleceniem: apt-get install xen-tools Oczywiście aby wszystko działało fajnie musimy ustawić kilka domyślnych opcji, robimy to edytując plik /etc/xen-tools/xen-tools.conf. Lecimy po kolei: # Virtual machine disks are created as logical volumes in # volume group 'universe' (hint: LVM storage is much faster # than file) lvm = universe Osobiście korzystam z LVM'a który zgodnie z hint'em jest znacznie szybszy od plików obrazów. Daje do tego bardzo wygodne możliwość w zarządzaniu rozmiarami wolumenów przydzielonych DomU, możliwość tworzenia snapshotów (np. na potrzeby backupu). Postawienie LVM'a w skrócie wygląda tak: