Linux-only free software

thumb|Preferred badge for promoting apps on Flathub since 2023, English version Flatpak is a utility for software deployment and package management for Linux. It provides a sandbox environment in which users can run application software in (partial) isolation from the rest of the system. Flatpak was known as xdg-app until 2016.

iptables is a user-space utility program that allows a system administrator to configure the IP packet filter rules of the Linux kernel firewall, implemented as different Netfilter modules. The filters are organized in a set of tables, which contain chains of rules for how to treat network traffic packets. Different kernel modules and programs are currently used for different protocols; iptables applies to IPv4, ip6tables to IPv6, arptables to ARP, and '''' to Ethernet frames.

systemd is a software suite for system and service management on Linux built to unify service configuration and behavior across Linux distributions. Its main component is an init system used to bootstrap user space and manage user processes. It also provides various daemons and utilities, including device management, login management, network connection management, and event logging. The name systemd adheres to the Unix convention of naming daemons by appending the letter d, and also plays on the French phrase Système D (a person's ability to quickly adapt and improvise in the face of problems

Linux Containers (LXC) is an operating system-level virtualization method for running multiple isolated Linux systems (containers) on a control host using a single Linux kernel.

thumb|400px|Cinelerra 2.1 being used to edit footage in a video project Cinelerra is a video editing and track-based digital compositing program (an NLE, Non-Linear Editor) designed for Linux. It is a free software distributed under the open source GNU General Public License. In addition to editing, it supports advanced composition operations such as keying and mattes, including a title generator, many effects to edit video and audio, keyframe automation, and many other professional functions depending on the variant. It processes audio in 64 floating-point form. Video is processed in RGBA or

Pitivi (originally spelled PiTiVi) is a free and open-source non-linear video editor for Linux, developed by various contributors from free software community and the GNOME project, with support also available from Collabora. Pitivi is designed to be the default video editing software for the GNOME desktop environment. It is licensed under the terms of the GNU Lesser General Public License.

load balancing software

The Syslinux Project is a discontinued suite of five different bootloaders for starting up Linux distributions on computers. It was primarily developed by H. Peter Anvin.

iproute2 is a collection of userspace utilities for controlling and monitoring various aspects of networking in the Linux kernel, including routing, network interfaces, tunnels, traffic control, and network-related device drivers.

'''''' is the command in Linux that allows a user to set certain attributes of a file. is the command that displays the attributes of a file.

K9Copy is a free and open-source DVD backup and DVD authoring program for Unix-like operating systems such as Linux and BSD. It is licensed under the GNU General Public License.

Flowblade Movie Editor is a free and open-source video editing software for Linux.

thumb|Slaptget print screen|250px|right

Qtractor is a hard disk recorder and digital audio workstation application for Linux. Qtractor is written in C++ and is based on the Qt framework. Its author is Rui Nuno Capela, who is also responsible for the Qjackctl, Qsynth and Qsampler line of Linux audio software. Qtractor's intention was to provide digital audio workstation software simple enough for the average home user, and yet powerful enough for the professional user.

Linux-VServer is a virtual private server implementation that was created by adding operating system-level virtualization capabilities to the Linux kernel. It is developed and distributed as open-source software.

Ksplice is an open-source extension of the Linux kernel that allows security patches to be applied to a running kernel without the need for reboots, avoiding downtimes and improving availability (a technique broadly referred to as dynamic software updating). Ksplice supports only the patches that do not make significant semantic changes to kernel's data structures.

In computing, SystemTap () is a scripting language and tool for dynamically instrumenting running production Linux-based operating systems. System administrators can use SystemTap to extract, filter and summarize data in order to enable diagnosis of complex performance or functional problems.

systemd-boot is a free and open-source boot manager, previously known as gummiboot.

free software

Checkpoint/Restore In Userspace (CRIU) (pronounced kree-oo, ), is a software tool for the Linux operating system. Using this tool, it is possible to freeze a running application (or part of it) and checkpoint it to persistent storage as a collection of files. One can then use the files to restore and run the application from the point it was frozen at. The distinctive feature of the CRIU project is that it is mainly implemented in user space, rather than in the kernel.