Distros

Parted Magic is a small live CD/USB/PXE with its elemental purpose being to partition hard drives. Although GParted and Parted are the main programs, the CD/USB also offers other applications, such as Partition Image, TestDisk, fdisk, sfdisk, dd, ddrescue, etc. In August 2013 the distribution became a commercial product and is no longer available as a free download.

PCLinuxOS is a user-friendly Linux distribution with out-of-the-box support for many popular graphics and sound cards, as well as other peripheral devices. The bootable live DVD provides an easy-to-use graphical installer and the distribution sports a wide range of popular applications for the typical desktop user, including browser plugins and full multimedia playback. The intuitive system configuration tools include Synaptic for package management, Addlocale to add support to many languages and Mylivecd to create a customised live CD.

pearOS is an Arch-based desktop Linux distribution which features a macOS-like theme and icons on top of the KDE Plasma desktop. Some of the distribution's features include a custom system installer called pearOS Installer, a pearOS welcome application, and the GNOME Files file manager. pearOS comes with various popular desktop, web and multimedia applications, such as the Gwenview image viewer, Firefox web browser, Elisa music player and Kate text editor.

PelandukOS is a desktop Linux distribution based on Debian's "Testing" branch and featuring the GNOME desktop. It supports installation of extra software in various formats, including the native DEB packages, as well as packages created by AppImage, Flatpak and snap technologies. The distribution uses the Calamares system installer and also includes the Steam launcher (a minimal Steam gaming client with a self-update mechanism that can download the full client) and WPS Office (an all-in-one, AI-powered office suite with MS Office compatibility).

PelicanHPC is a Debian-based live CD image with a goal to make it simple to set up a high performance computing cluster. The front-end node (either a real computer or a virtual machine) boots from the CD image. The compute nodes boot by Pre-Execution Environment (PXE), using the front-end node as the server. All of the nodes of the cluster get their file systems from the same CD image, so it is guaranteed that all nodes run the same software. The CD image is created by running a single script, which makes it possible to customise the live CD image with extra Debian packages.

Peppermint OS is a Debian- and Devuan-based (previously a Lubuntu-based) Linux distribution that aims to be fast and easy on system resources. By employing its Site Specific Browser, Peppermint integrates seamlessly with cloud and web-based applications. The distribution's other features include straight forward updates and easy step-by-step installation using the Calamares installer. The distribution once employed a hybrid LXDE/Xfce desktop environment, mixing LXDE's lxsession with Xfce's panel and application menu. Starting in 2022, Peppermint OS shifted to using the Xfce desktop, dropping the LXDE components.

Peropesis (personal operating system) is a small-scale, minimalist, command-line-based Linux operating system. It's an incomplete system, but it's constantly being improved. Also, it is a free operating system created from free software, mostly distributed under the GNU GPL or BSD licenses.

pfSense is a free, open source customized distribution of FreeBSD specifically tailored for use as a firewall and router that is entirely managed via web interface. In addition to being a routing platform, pfSense includes a long list of related features and a package system which allows further expandability.