Raspberry Pi OS has become the benchmark operating system For anyone who has a Raspberry Pi on their desk, whether for tinkering, setting up a home server, or giving an old monitor a second life. Behind that simple appearance lies a wealth of technical details, different editions, significant security changes, and an ecosystem that continues to grow with each new board.
Throughout this article you will find all the special features of Raspberry Pi OSFrom its origins as Raspbian to the current Debian 13-based version "Trixie," including Bullseye, the 32-bit and 64-bit editions, actual hardware requirements, proprietary tools like raspi-config and PIXEL, security options, performance, backups, SSD installation, official support, and recommended uses. The goal is that, by the time you finish reading, you'll have a fairly complete picture of what this system offers and whether it's right for your project.
What exactly is Raspberry Pi OS and how does it differ?
Raspberry Pi OS (formerly Raspbian) is a GNU/Linux distribution based on Debian. and fine-tuned for Raspberry Pi boards. It was born as a community project in 2012 (by Mike Thompson and Peter Green) and, since 2015, the Raspberry Pi Foundation has offered it as the official operating system for its SBCs (Single Board Computers).
At a technical level, Raspberry Pi OS started as an unofficial port of Debian armhf Adapted to the ARMv6 of the first Raspberry Pi model, with optimized hardware floating-point support. This was key, because at that time Debian did not offer armhf for that CPU, and without this prior work the performance would have been quite poor.
Over the years it has evolved from the early branches based on Wheezy, Jessie, Stretch and Buster, to the major revisions Bullseye (Debian 11) and Trixie (Debian 13)Today, the 6.0 series based on Debian 13 “Trixie”, released on October 1, 2025, is the most modern stable branch, with support aligned to the Debian cycle: about 5 years of updates, approximately until 2030.
It should be noted that Several "generations" of Raspberry Pi OS coexistMany projects remain on Bullseye (Debian 11, with LTS support until August 2026), while new installations tend to use Trixie. In all cases, the Debian philosophy is maintained: stability, huge repositories, and long package lifespans.
Legally, Raspberry Pi OS is distributed under a set of free licenses (mainly GPL, 3-clause BSD and MIT), although it includes some proprietary components: closed firmware, certain drivers and packages such as Wolfram Mathematica licensed for non-commercial use.
Raspberry Pi OS Editions and Implementation Models
One of the most confusing things when starting out is that There isn't just one Raspberry Pi OS image, but several editions.designed for different uses and with very different sizes.
In the current branches (Bullseye and Trixie) it is common to find three base variants for Raspberry Pi ARM architecture:
- Raspberry Pi OS with desktopIt includes the PIXEL environment, Chromium browser, VLC, Python, and basic utilities. It's the standard option for using the Pi as a lightweight PC.
- Raspberry Pi OS FullIt adds to the above the "recommended software": LibreOffice, Scratch, Sonic Pi, Thonny, networking tools, educational packages, etc. It is the biggest and most complete picture.
- Raspberry Pi OS LiteMinimal version with no graphical environment. Just a console, basic services, and package manager. Perfect for servers, IoT, or anyone who wants to build their system piece by piece.
Historically, images of approximate sizes were discussed: 2,5 GB for the “Full” edition with all the recommended software, around 1,1 GB for the image with desktop and basic programs, and about 400 MB for the Lite versionToday the exact figures change with each release, but the general idea remains: the more complete it is, the more space it takes up on the microSD card.
In addition to the images for the license plates, There is an x86/x86_64 version of Raspberry Pi OS. With the PIXEL desktop environment, it's designed for reusing older PCs. It installs from USB just like any other lightweight desktop distribution.
Regarding the installation method, the recommended approach is to use Raspberry Pi ImagerThe official utility downloads the appropriate image and writes it directly to a microSD card or USB/SSD drive. ZIP images are also available for manual download and writing with tools such as balenaEtcher or Win32DiskImager.
Technical requirements and compatible hardware
One of the system's great strengths is that Raspberry Pi OS is designed to squeeze the most out of very modest hardwareEven so, to have a smooth experience it is advisable to know the reasonable minimums.
As for memory, The system can boot with 512 MB of RAM (for example, on older models or using the Lite variant), but for a graphical desktop, it makes sense to start with 1 GB. If you're going to use the modern environment with Mutter, multiple browser tabs, or heavy applications, 2 GB become almost mandatory, and 4-8 GB make a difference in models like Raspberry Pi 4 or Raspberry Pi 5.
At the CPU level, Raspberry Pi OS supports the entire family of boards with ARM architecture. (Raspberry Pi 2 and later, Zero 2 W, Pi 3, 4, 400, 5, Compute Module, etc.), except the Raspberry Pi PeakIt uses an RP2040 microcontroller and runs other operating systems (not a full Linux system). For PCs, the x86 variant allows installation on 32-bit and 64-bit processors.
Regarding storage, the minimum for a desktop computer is 8 GB microSDHowever, if you're going to install the "recommended software" edition or store data, a good quality 16 or 32 GB card is advisable. Modern models allow for even more storage. boot from USB or SSD, which greatly improves the system's agility compared to a cheap SD card.
At the level of physical connectivity, the system takes advantage of HDMI or micro HDMI video outputs (depending on the motherboard) and also DSI and composite video in models that integrate it; for Using a touchscreen on Raspberry Pi OSUSB ports allow you to connect a keyboard, mouse, external hard drives, and other peripherals, while Ethernet, Wi-Fi and Bluetooth (when the model includes them) are managed with drivers integrated into the kernel.
There is even a version of Raspberry Pi OS for Armel architecture (very old models)However, Debian 13 “Trixie” will be the last branch compatible with them, with support planned until approximately 2030. After that, only the most recent models will continue to receive new versions.
PIXEL graphical environment and desktop experience
In the visual section, Raspberry Pi OS opts for a lightweight and uncluttered interfaceIt focuses on ensuring everything runs smoothly even on modest hardware. The desktop environment is based on LXDE, but is highly customized.
The environment is called PIXEL (Pi Improved X‑Window Environment, Lightweight)It combines LXDE with the Openbox window manager and a custom theme, featuring icons, backgrounds, and panels adapted for Raspberry Pi. The goal is to provide a familiar desktop environment for anyone coming from Windows or other distributions, but without hogging RAM.
In the more modern versions (Bullseye onwards) a latest graphics stack based on GTK3 and the gradual transition to the Mutter window manager on computers with 2 GB of RAM or more. Mutter offers more polished animations and effects, but it also consumes more resources than the classic Openbox.
By default, it is included Chromium optimized for ARMIt includes VLC media player, LibreOffice suite (full version shown in the image), and a good collection of educational and network administration tools. All of this means that, on a modern model like a Raspberry Pi 4 or 5, you can use it as an everyday PC for basic office tasks, browsing, and programming without too much trouble.
Some users, however, comment that The interface may seem somewhat outdated. compared to desktops like GNOME or KDE, and on motherboards with less memory, the lack of processing power is noticeable if many browser tabs are opened without an ad blocker.
Easy setup with raspi-config and wizards
One of the most valued ingredients is the configuration tool "raspi-config", a text-mode menu that allows you to adjust most parameters without diving through configuration files.
With raspi-config you can Change user password, configure location (language, keyboard layout, time zone), adjust the memory shared with the GPU, enable SSH, VNC, SPI, I2C, CSI camera, expand the root partition to occupy the entire card, and even overclocking the Raspberry Pi in a guided manner.
In recent versions, when the desktop starts for the first time, a graphical assistant (piwiz) It guides you through the basics: language, keyboard, Wi-Fi, initial update, and user creation. This has replaced the old practice of using Raspberry Pi as the default credentials.
If you prefer to leave everything set up without a monitor (headless mode), Raspberry Pi Imager incorporates an advanced menu From the gear icon: there you can predefine the hostname, activate SSH, set username and password, configure Wi-Fi and time zone even before booting the Pi.
In the past, the NOOBS (New Out Of Box Software) installer was also used, which offered a menu for choosing the operating system and included recovery functions. Although it still exists in some contexts, Imager has become the recommended tool for almost any new installation.
Security: from default credentials to a more robust approach
In terms of security, Raspberry Pi OS It inherits the robustness of the Debian ecosystemwith constant security updates and quick patches for known vulnerabilities. But it has also been correcting some specific historical weaknesses of the platform.
For years, the great Achilles' heel was the massive use of the user "pi" with the password "raspberry"This was something any internet bot was well aware of. This made many Raspberry Pis open to the internet easy targets if the user didn't change anything after installation.
In current branches, this problem has been corrected by forcing create your own username and password during initial setupeither from the graphical assistant or from Imager. In addition, features such as screen lock and auto-login settings have been improved to reduce unnecessary exposures.
In terms of tools, Raspberry Pi OS supports standard Linux mechanismsThe Pi includes a firewall with iptables or UFW, SSH key authentication, disk encryption with LUKS (which requires some manual work), and the full TLS/SSL encryption stack for network services. The kernel integrates specific drivers for the Pi's hardware, which are frequently updated.
It doesn't boast formal safety certifications, but It benefits from continuous review by the Linux community. and Debian's patch policy. The critical thing, as always, is for the user to keep the system up to date, disable unused services, change default passwords, and restrict SSH access with keys instead of just passwords.
Performance, consumption and energy footprint
In terms of performance, Raspberry Pi OS stands out more for its efficiency than for its brute forceUltimately, it's designed to run on low-power motherboards, not to compete with high-end workstations.
Synthetic benchmark metrics are not published as systematically for the operating system itself, because Performance depends more on the motherboard (Pi 2, 3, 4, 5, Zero, etc.) and the type of storage (cheap microSD versus SSD) rather than minor software variations. Even so, internal comparisons have shown that the The 64-bit version can perform up to 30% better than the 32-bit version in certain workloads, with specific cases where the improvement is even greater.
In the Bullseye branch, some users detected slightly slower startup times While Buster is partly due to the new graphics stack (KMS, Mutter, etc.), in daily use the experience is usually better, especially in web browsing and video playback thanks to hardware acceleration in Chromium.
Where Raspberry Pi OS really shines is in energyA typical setup with a Pi 4 or Pi 5 rarely exceeds 15W, and many IoT or thin server projects consume negligible amounts compared to a traditional PC. This translates to a very low carbon footprint for services that need to work 24/7 (VPN, small NAS, home automation, etc.).
Compared to other generic Linux distributions for ARM, the official distro usually offers Improved integration with the VideoCore GPU, GPIO hardware, and CSI camerasThis is noticeable in video, basic 3D acceleration, and projects that rely on low-level hardware access.
Support, lifecycles, and localization
At the support level, Raspberry Pi OS is fully integrated with Debian.This means that each major branch (Buster, Bullseye, Bookworm, Trixie, etc.) has a standard support period and, in many cases, an extended support (LTS) stage for security patches.
For instance, Debian 11 “Bullseye” had regular support until August 2024 and will continue to receive LTS security updates until August 31, 2026. Debian 13 “Trixie”, the basis of Raspberry Pi OS 6.0, has a planned lifecycle of about 5 years, with an approximate horizon until 2030, especially important for the older armel models, for which it will be the last supported version.
The community's own recommendation is that, in the big version jumps (For example, from Buster to Bullseye or from Bullseye to Trixie), a clean installation is recommended instead of an in-place upgrade on critical systems. This is good practice to avoid carrying over old configurations or conflicting packages.
As for languages, Raspberry Pi OS offers broad localizationwith support for more than 20 languages (including Spanish from Spain and Latin America), keyboard layout, date formats, currency, etc. All these settings can be changed from the graphical configuration utility or from raspi-config in the console.
The driver section is very well done: The specific drivers for each generation of Raspberry Pi are integrated into the kernel.This includes support for libcamera (the new camera infrastructure), dual HDMI on compatible models, GPIO, SPI/I2C buses, Wi-Fi, Bluetooth, etc. In many cases, this means you can simply plug in the board, power it on, and everything will work without needing to search for additional modules.
Backups, USB/SSD installation, and auxiliary tools
In day-to-day life it's easy to forget about it, but back up your Raspberry Pi microSD card It can save you more than one headache, especially if you already have a complex project set up.
In Windows, the classic option is Win32DiskImagerwhich not only records images on cards, but also allows clone an SD card to an IMG file to save and restore it whenever you want. On Linux and macOS, many users use the command dd for backup and restore, or for utilities like ApplePi-Baker on Mac.
An important detail is that SD cards should be formatted using the official SD Card Formatter tool. (from the SD Association) instead of using the operating system's generic formatter. This respects the characteristics of the "Protected Area" and optimizes the card's performance and durability.
Since the Raspberry Pi can boot directly from USBIt's becoming increasingly common to install Raspberry Pi OS on an external SSD or a fast USB drive. The official documentation explains the different boot modes, including USB Mass Storage boot and network boot, something especially useful in laboratory environments or for clusters.
For those who want an even more “visual” experience in the initial setup, there was also PiBakeryIt was a tool that allowed users to create configuration scripts using Scratch-style blocks and prepare an image with Wi-Fi, SSH, and other services already enabled. Although Imager has absorbed many of these functions, it remains a useful resource for automating deployments.
Headless installation and remote access
A very practical feature, especially in small models like the Zero 2 W, is the ease of Install and manage Raspberry Pi OS without a monitor or keyboardThat is, in headless mode.
Using Raspberry Pi Imager you can Define in advance the username, password, Wi-Fi network, and SSH activationso that, when you insert the SD card and boot up, the board connects directly to your network and you can log in via SSH from your PC or laptop.
Once the system is up and running, all you need to do is find out the IP address (for example, with ifconfig or by looking at the router) or using the hostname with mDNS, something like raspberrypi.local or the configured hostname. From there, you can access it via SSH with a client like PuTTY or, if you prefer something more comprehensive, with tools like MobaXterm.
For remote desktop control, Raspberry Pi OS integrates official VNC serverwhich can be activated from raspi-config or from the graphical interface. Using VNC Viewer on the PC displays the entire Pi desktop in a window, which is very useful when the board is on a shelf, inside a communications cabinet, or integrated into a project.
On slightly more advanced networks you can play with Static IPs, DHCP profiles, and hostname changes so that each Raspberry Pi in your home or lab has a clearly identified function and address, something that is configured in files like /etc/dhcpcd.conf y /etc/network/interfaces or from the desktop's own network tools.
Relationship with Raspberry Pi hardware and recommended use cases
The context of all this is that Raspberry Pi OS exists to take advantage of a very wide family of boardsFrom the first Model A and B to the latest Raspberry Pi 5, including Zero, Compute Module, Pi 400 (keyboard with integrated Pi), Pico (RP2040 microcontrollers) and future variants.
In the standard models (Pi 3, 4, 5, 400, etc.), Raspberry Pi OS is primarily used as low-cost “all-purpose computer”: browsing the internet, editing documents with LibreOffice, programming in Python, setting up a lightweight media center, managing a small home automation system, or playing with retro emulators.
In the field of projects, the list of ideas seen online is enormous: VPN servers, home NAS, retro consoles with RetroPie, media centers with LibreELEC (in this case using another system, but the philosophy is the same), video surveillance systems with CSI cameras, air quality meters, weather stations, smart mirrors (Magic Mirror), home automation control of lights and blinds, etc.
For very specific uses there are alternative distributions that may fit betterUbuntu Server is for more serious servers, LibreELEC if you only want Kodi, and Lakka or Recalbox if your goal is solely to emulate consoles. But for learning, prototyping, or having a versatile system, the official system is usually the most balanced option.
In education, Raspberry Pi OS is central component of many computer science and electronics courses, both in schools and universities. Between GPIO, Python, DIY projects and networking tools, it allows you to cover a huge range of content without the need for expensive hardware.
User reviews: strengths and weaknesses
If you look through forums and communities, you'll find the same messages repeated quite often: Users appreciate the stability, the documentation, and how easy it is to get started. with Raspberry Pi OS, especially if it's their first time using Linux.
Among the positive points, the following stand out: Regular updates, PIXEL's intuitive interface, and fast startup In modern models, the versatility of being able to use the same base for a lightweight PC, a home server, or an IoT project is a plus. It's also appreciated that it comes with "almost everything you need" pre-installed in the Full image.
On the less favorable side, some comments point out Slow browsing speed if many tabs are open without an ad blockerespecially on motherboards with 1 GB of RAM or on older models. Others consider the desktop somewhat "retro" compared to GNOME or KDE and miss more visual flourishes.
Large version transitions (for example, to Bullseye or Trixie) have also caused their share of headaches: Specific issues with older HATs, changes in the KMS video stack that did not get along well with certain resolutions and adjustments needed in projects that depended on old APIs.
Even so, the general feeling is that, for the price of a Raspberry Pi and what Raspberry Pi OS offersThe performance/price/consumption ratio is hard to match, and the community ends up finding solutions for almost any problem that arises.
All these features make Raspberry Pi OS a very solid choice when looking for a lightweight operating system, well supported and adapted to the Raspberry Pi hardwareIt combines the stability and vast ecosystem of Debian with its own tools like PIXEL and raspi-config, offers editions for all types of projects, maintains a clear commitment to security and low power consumption, and boasts a gigantic community that documents every step; if you need a reliable base on which to build anything from a simple educational PC to a cluster of boards or a complete home automation system, this operating system will most likely fit without too many surprises.
