The Embedded Linux* Library (ELL) provides core, low-level functionality for system daemons. It typically has no dependencies other than the Linux kernel, C standard library, and libdl (for dynamic linking). While ELL is designed to be efficient and compact enough for use on embedded Linux platforms, it is not limited to resource-constrained systems.

The EVDI is a Linux kernel module that enables management of multiple screens, allowing user-space programs to take control over what happens with the image. It is essentially a virtual display for which applications using the libevdi library can add, remove, and receive screen updates.

The EVDI driver uses the standard Linux DRM. Its displays can be controlled by standard tools such as xrandr and display settings applets in graphical environments

The rasdaemon daemon monitors platform RAS reports from Linux kernel trace events. These trace events are logged in /sys/kernel/debug/tracing and reported through standard log mechanisms like syslog.

The USB/IP protocol enables to pass USB device from a server to a client over the network. The server is a machine which shares an USB device and the client is a machine which uses USB device provided by a server over the network. The USB device may be either physical device connected to a server or software entity created on a server using USB gadget subsystem. The usbip-utils are userspace tools to used to handle connection and management on both side. The client needs the vhci-hcd Linux kernel module and the server needs the usbip_host Linux kernel module.

The inotify-tools packages provides a C library and command-line tools to use Linux' inotify mechanism, which allows file accesses to be monitored.

PRoot is a user-space implementation of chroot, mount --bind, and binfmt_misc. This means that users don't need any privileges or setup to do things like using an arbitrary directory as the new root file system, making files accessible somewhere else in the file system hierarchy, or executing programs built for another CPU architecture transparently through QEMU user-mode. Also, developers can use PRoot as a generic process instrumentation engine thanks to its extension mechanism. Technically PRoot relies on ptrace, an unprivileged system-call available in the kernel Linux.

NUMA stands for Non-Uniform Memory Access, in other words a system whose memory is not all in one place. The numactl program allows you to run your application program on specific CPUs and memory nodes. It does this by supplying a NUMA memory policy to the operating system before running your program.

The package contains other commands, such as numastat, memhog, and numademo which provides a quick overview of NUMA performance on your system.

PipeWire is a project that aims to greatly improve handling of audio and video under Linux. It aims to support the usecases currently handled by both PulseAudio and Jack and at the same time provide same level of powerful handling of Video input and output. It also introduces a security model that makes interacting with audio and video devices from containerized applications easy, with supporting Flatpak applications being the primary goal. Alongside Wayland and Flatpak we expect PipeWire to provide a core building block for the future of Linux application development.

Monitor a hardware random number generator, and supply entropy from that to the system kernel's /dev/random machinery.

libnetfilter_log is a userspace library providing interface to packets that have been logged by the kernel packet filter. It is is part of a system that deprecates the old syslog/dmesg based packet logging. This library has been previously known as libnfnetlink_log.

1. receiving to-be-logged packets from the kernel nfnetlink_log subsystem

Headers of the Linux-Libre kernel.

Headers of the Linux-Libre kernel.

jmtpfs uses FUSE to provide access to data over MTP. Unprivileged users can mount the MTP device as a file system.

libnetfilter_conntrack is a userspace library providing a programming interface (API) to the in-kernel connection tracking state table. The library libnetfilter_conntrack has been previously known as libnfnetlink_conntrack and libctnetlink. This library is currently used by conntrack-tools among many other applications.

As a consequence of its monolithic design, file system code for Linux normally goes into the kernel itself---which is not only a robustness issue, but also an impediment to system extensibility. FUSE, for "file systems in user space", is a kernel module and user-space library that tries to address part of this problem by allowing users to run file system implementations as user-space processes.

WirePlumber is a modular session / policy manager for PipeWire and a GObject-based high-level library that wraps PipeWire's API, providing convenience for writing the daemon's modules as well as external tools for managing PipeWire.

Procps is the package that has a bunch of small useful utilities that give information about processes using the Linux /proc file system. The package includes the programs free, pgrep, pidof, pkill, pmap, ps, pwdx, slabtop, tload, top, vmstat, w, watch and sysctl.

F2FS, the Flash-Friendly File System, is a modern file system designed to be fast and durable on flash devices such as solid-state disks and SD cards. This package provides the userland utilities.

FuseISO is a FUSE module to mount ISO file system images (.iso, .nrg, .bin, .mdf and .img files). It supports plain ISO9660 Level 1 and 2, Rock Ridge, Joliet, and zisofs.

GNU Linux-Libre is a free (as in freedom) variant of the Linux kernel. It has been modified to remove all non-free binary blobs.

strace is a system call tracer, i.e. a debugging tool which prints out a trace of all the system calls made by a another process/program.

This package provides the statically-linked btrfs from the btrfs-progs package. It is meant to be used in initrds.

This package provides a shell script to assess your system's resilience against the several transient execution CVEs that were published since early 2018, and gives guidance as to how to mitigate them.

libnetfilter_cthelper is a userspace library that provides a programming interface to user-space connection tracking helpers.

1. register new user-space connection tracking helpers

2. unregister user-space connection tracking helpers

3. list existing registered user-space connection tracking helpers