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.

x86_energy_perf_policy displays and updates energy-performance policy settings specific to Intel Architecture Processors. Settings are accessed via Model Specific Register (MSR) updates, no matter if the Linux cpufreq sub-system is enabled or not.

Btrfs is a CoW file system for Linux aimed at implementing advanced features while focusing on fault tolerance, repair and easy administration.

The libseccomp library provides an easy to use, platform independent, interface to the Linux Kernel's syscall filtering mechanism. The libseccomp API is designed to abstract away the underlying BPF based syscall filter language and present a more conventional function-call based filtering interface that should be familiar to, and easily adopted by, application developers.

Procenv is a command-line tool that displays as much detail about itself and its environment as possible. It can be used as a test tool, to understand the type of environment a process runs in, and for comparing system environments.

This library provides APIs to access the Linux kernel's trace file system.

Collection of tools to query what type of USB devices are connected to the system, including lsusb. The experimental usbreset command included in the package, but be aware that it may not work for all devices.

The Falco security libraries include libsinsp and libscap. libscap manages the data capture process, while libsinsp is a system inspection library that enriches events from libscap with machine state. libsinsp also performs events filtering with rule evaluation through its internal rule engine. These libraries are used by the sysdig command-line utility.

This package provides the kexec program and ancillary utilities. Using kexec, it is possible to boot directly into a new kernel from the context of an already-running kernel, bypassing the normal system boot process.

This package provides a PAM module that hands over your login password to gpg-agent. This can be useful if you are using a GnuPG-based password manager like pass.

Headers of the Linux-Libre kernel.

iotop identifies which processes and threads are most responsible for I/O activity such as disc reads and writes. It sorts them in a live, interactive table overview similar to that of the well-known top.

This information makes it much easier for an administrator to see which tasks are blocking others and adjust their priority (using ionice) or stop or kill them altogether.

snapscreenshot saves a screenshot of one or more Linux text consoles as a Targa (.tga) image. It can be used by anyone with read access to the relevant /dev/vcs* file(s).

Powerstat measures and reports your computer's power consumption in real time. On mobile PCs, it uses ACPI battery information to measure the power drain of the entire system.

Powerstat can also report RAPL power domain measurements. These are available only on some hardware such as Intel Sandybridge and newer, and cover only part of the machine's components such as CPU, DRAM, and graphics. However, they provide accurate and immediate readings and don't require a battery at all.

The output is like vmstat but also shows power consumption statistics: at the end of a run, powerstat will calculate the average, standard deviation, and minimum and maximum values. It can show a nice histogram too.

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

The mcelog daemon logs memory, I/O, CPU, and other hardware errors on x86 systems running the kernel Linux. It can also perform user-defined tasks, such as bringing bad pages off-line, when configurable error thresholds are exceeded.

Libcap2 provides a programming interface to POSIX capabilities on Linux-based operating systems.

This package provides means to to read BitLocker encrypted partitions. Write functionality is also provided but check the README.

This Linux module creates virtual video devices. V4L2 applications will treat these as ordinary video devices but read video data generated by another application, instead of a hardware device such as a capture card.

This lets you apply nifty effects to your Jitsi video, for example, but also allows some more serious things like adding streaming capabilities to an application by hooking GStreamer into the loopback device.

Interception Tools provides a composable infrastructure on top of libudev and libevdev. The following utilities are provided:

• udevmon --- monitor input devices for launching tasks

• intercept --- redirect device input events to stdout

• uinput --- redirect device input events from stding to virtual device

• mux --- mux streams of input events

This utility can read or write specific registers or all the available registers of the EC supported by the ec_sys Linux driver.

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.

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.

Headers of the Linux-Libre kernel.