2 - Raspberry PI Community Projects

SHA1: 350a8a7a43fe182d54f3b7d73b8032f85b5d7ddf
SHA256: a593e7d7f9b3cffa37770201a3c13bd2c8bc588bafbf39b4aaa5e13b5fb00b8b
Description: Advanced front-end for dpkg
This is Debian's next generation front-end for the dpkg package manager.
It provides the apt-get utility and APT dselect method that provides a
simpler, safer way to install and upgrade packages.
.
APT features complete installation ordering, multiple source capability
and several other unique features, see the Users Guide in apt-doc.
Tag: admin::package-management, hardware::storage, hardware::storage:cd,
➥ interface::commandline, network::client, protocol::{ftp,http,ipv6},
➥ role::program, suite::debian, use::downloading, use::searching, works-
➥ with::software:package
BACK TO BASICS
RFC — Internet standards
RFC is the abbreviation of “Request For Comments”. An RFC is generally a
technical document that describes what will become an Internet standard.
Before becoming standardized and frozen, these standards are submied for
public review (hence their name). The IETF (Internet Engineering Task Force)
decides on the evolution of the status of these documents (proposed standard,
dra standard, or standard).
RFC 2026 defines the process for standardization of Internet protocols.
➨ http://www.faqs.org/rfcs/rfc2026.html
5.2.1.1. Dependencies: the Depends Field
The dependencies are defined in the Depends field in the package header. This is a list of conditions
to be met for the package to work correctly — this information is used by tools such as apt
in order to install the required libraries, in their appropriate versions, that the program to be
installed depends on. For each dependency, it is possible to restrict the range of versions that
meet that condition. In other words, it is possible to express the fact that we need the package
libc6 in a version equal to or greater than “2.3.4” (written “libc6 (>=2.3.4)”). Version
comparison operators are as follows:
• : greater than.
In a list of conditions to be met, the comma serves as a separator. In logic, its meaning would be
interpreted as “and”. In conditions, the vertical bar (“|”) expresses “or” in logic (it is an inclusive
Chapter 5 — Packaging System: Tools and Fundamental Principles
79