Singularity is a container platform supporting a number of container image formats. It can build SquashFS container images or import existing Docker images. Singularity requires kernel support for container isolation or root privileges.

Zerofree finds the unallocated blocks with non-zero value content in an ext2, ext3, or ext4 file system and fills them with zeroes (or another value). This is a simple way to make disk images more compressible. Zerofree requires the file system to be unmounted or mounted read-only.

Libavc1394 is a programming interface to the AV/C specification from the 1394 Trade Association. AV/C stands for Audio/Video Control.

cachefilesd is a userspace daemon that manages the cache data store that is used by network file systems such as AFS and NFS to cache data locally on disk. The content of the cache is persistent over reboots.

kernel-hardening-checker is a tool for checking the security hardening options of the Linux kernel. Provided preferences are based on suggestions from various sources, including:

• KSPP recommended settings

• CLIP OS kernel configuration

• Last public grsecurity patch (options which they disable)

• SECURITY_LOCKDOWN_LSM patchset

• Direct feedback from the Linux kernel maintainers

This tool supports checking Kconfig options and kernel cmdline parameters.

This package provides a way to access the System Management Unit for certain AMD Ryzen processors. This includes access to the System Management Network.

TLP is a power management tool for Linux. It comes with a default configuration already optimized for battery life. Nevertheless, TLP is customizable to fulfil system requirements. TLP settings are applied every time the power supply source is changed.

evtest is a tool to print evdev kernel events. It reads directly from the kernel device and prints a device description and the events with the value and the symbolic name.

iucode_tool is a utility to work with microcode packages for Intel processors. It can convert between formats, extract specific versions, create a firmware image suitable for the Linux kernel, and more.

Prevents shock damage to the internal spinning hard drive(s) of some HP and Dell laptops. When sudden movement is detected, all input/output operations on the drive are suspended and its heads are parked on the ramp, where they are less likely to cause damage to the spinning disc. Requires a drive that supports the ATA/ATAPI-7 IDLE IMMEDIATE command with unload feature, and a laptop with an accelerometer. It has no effect on SSDs.

Libraw1394 is the only supported interface to the kernel side raw1394 of the Linux IEEE-1394 subsystem, which provides direct access to the connected 1394 buses to user space. Through libraw1394/raw1394, applications can directly send to and receive from other nodes without requiring a kernel driver for the protocol in question.

Early OOM is a minimalist out of memory (OOM) daemon that runs in user space and provides a more responsive and configurable alternative to the in-kernel OOM killer.

The VHBA module is the link between the CDemu user-space daemon and the kernel Linux. It acts as a low-level SCSI driver that emulates a virtual SCSI adapter which can have multiple virtual devices attached to it. Its typical use with CDEmu is to emulate optical devices such as DVD and CD-ROM drives.

The bbswitch module provides a way to toggle the Nvidia graphics card on Optimus laptops.

This tool turns ldd into a tree and explains how shared libraries are found or why they cannot be located.

rfkill is a simple tool for accessing the rfkill device interface, which is used to enable and disable wireless networking devices, typically WLAN, Bluetooth and mobile broadband.

The Advanced Linux Sound Architecture (ALSA) provides audio and MIDI functionality to the Linux-based operating system. This package enhances ALSA by providing additional plugins which include: upmixing, downmixing, jackd and pulseaudio support for native alsa applications, format conversion (s16 to a52), and external rate conversion.

The libnl suite is a collection of libraries providing APIs to netlink protocol based Linux kernel interfaces. Netlink is an IPC mechanism primarily between the kernel and user space processes. It was designed to be a more flexible successor to ioctl to provide mainly networking related kernel configuration and monitoring interfaces.

mdadm is a tool for managing Linux Software RAID arrays. It can create, assemble, report on, and monitor arrays. It can also move spares between raid arrays when needed.

This package provides a C library with C++ bindings and command-line tools for interacting with GPIO devices that avoids the usage of older system-wide /sys interface.

efibootmgr is a user-space application to modify the Intel Extensible Firmware Interface (EFI) Boot Manager. This application can create and destroy boot entries, change the boot order, change the next running boot option, and more.

The Advanced Linux Sound Architecture (ALSA) provides audio and MIDI functionality to the Linux-based operating system.

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.

This package provides the documentation for the kernel Linux-Libre, as an Info manual. To consult it, run info linux.