LGPLv2+ and LGPLv2+ with exceptions and GPLv2+ and GPLv2+ with exceptions and BSD and Inner-Net-2.0 and ISC and Public Domain and GFDL-1.3-only
Interface to the syscall filtering mechanism
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.
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The GNU Secure Communication Protocol Library
GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.
Nettle is a cryptographic library designed to fit any context: in crypto toolkits for object-oriented languages, in applications like LSH or GnuPG, or even in kernel space.
systemd is a system and service manager that runs as PID 1 and starts the rest of the system.
The GNU C Library project provides the core libraries for the GNU system and GNU/Linux systems, as well as many other systems that use Linux as the kernel. These libraries provide critical APIs including ISO C11, POSIX.1-2008, BSD, OS-specific APIs and more. These APIs include such foundational facilities as open, read, write, malloc, printf, getaddrinfo, dlopen, pthread_create, crypt, login, exit and more.
chrony is a versatile implementation of the Network Time Protocol (NTP). It can synchronise the system clock with NTP servers, reference clocks (e.g. GPS receiver), and manual input using wristwatch and keyboard. It can also operate as an NTPv4 (RFC 5905) server and peer to provide a time service to other computers in the network.
Tools for managing accounts and shadow password files
This package includes the necessary programs for converting plain password files to the shadow password format and to manage user and group accounts.
Libedit is the automatic tool and libtoolized port of the NetBSD Editline library. It provides generic line editing, history, and markup functions similar to those in GNU Readline.
A set of basic GNU tools commonly used in shell scripts
These are the GNU core utilities. This package is the combination of the old GNU fileutils, sh-utils, and textutils packages.
D-Bus service for system clock and RTC settings
timedatex is a D-Bus service that implements the org.freedesktop.timedate1 interface. It can be used to read and set the system clock, the real-time clock (RTC), the system timezone, get a list of valid timezones, and enable or disable an NTP client installed on the system. It is a replacement for the systemd-timedated service.
A library for getting and setting POSIX.1e draft 15 capabilities
This is a library for getting and setting POSIX.1e (formerly POSIX 6) draft 15 capabilities.
Bash is the GNU Project's shell. Bash is the Bourne Again SHell. Bash is an sh-compatible shell that incorporates useful features from the Korn shell (ksh) and C shell (csh). It is intended to conform to the IEEE POSIX P1003.2/ISO 9945.2 Shell and Tools standard. It offers functional improvements over sh for both programming and interactive use. In addition, most sh scripts can be run by Bash without modification.