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Glossary¶

ABI¶

ABI stands for Application Binary Interface. An ABI is an interface that defines how two modules interact with each other at the machine code level. Most often, these modules are applications using external libraries. An ABI defines a low-level and hardware-dependent interface compared to an an Application Programming Interface (API), which is considered high-level and hardware-independent.

See ABI for more details.

Related topic(s): Automation.

Apache2¶

A robust, open-source HTTP server software designed for the deployment and delivery of web-based applications and content. Functioning as a request-response service, Apache 2 processes HTTP requests from client applications, facilitating the transmission of static and dynamic web resources. Characterized by its modular architecture, it supports a wide array of extensions, enabling customizable functionality including security protocols (e.g., SSL/TLS), server-side scripting, and content management. Widely deployed in diverse server environments, Apache 2 is a foundational component of numerous web infrastructure stacks, underpinning a substantial portion of internet-accessible services. See the Apache project documentation for more details.

API¶

Work in Progress

AppArmor¶

Work in Progress

Apport¶

Work in Progress

APT¶

Work in Progress

armhf¶

Work in Progress

ARP¶

Work in Progress

ArrayBolt¶

Work in Progress

async¶

Work in Progress

Authenticator¶

Work in Progress

autocommit¶

Work in Progress

autodetect¶

Work in Progress

autoinstall¶

Work in Progress

autorid¶

Work in Progress

AWS¶

Work in Progress

AX¶

Work in Progress

backend¶

Work in Progress

Backports¶

Work in Progress

Backtrace¶

Work in Progress

BackupServer¶

Work in Progress

Bacula¶

Work in Progress

BDC¶

Work in Progress

bdev¶

Work in Progress

BindDN¶

Work in Progress

BMC¶

Work in Progress

bootable¶

Work in Progress

bootloader¶

Work in Progress

bootp¶

Work in Progress

bootstrap¶

Work in Progress

BSD¶

Work in Progress

btrfs¶

Work in Progress

bugfix¶

Work in Progress

Byobu¶

Work in Progress

CA¶

Work in Progress

CAC¶

Work in Progress

CARP¶

Work in Progress

CCID¶

Work in Progress

CDBs¶

Work in Progress

CentOS¶

Work in Progress

certmap¶

Work in Progress

certutil¶

Work in Progress

cfg¶

Work in Progress

CGI¶

Work in Progress

CGNAT¶

Work in Progress

cgroup¶

Work in Progress

CHACHA¶

Work in Progress

checksums¶

Work in Progress

checkzone¶

Work in Progress

chrony¶

Work in Progress

chroot¶

Work in Progress

CIDR¶

Work in Progress

CIFS¶

Work in Progress

cipherlist¶

Work in Progress

CipherString¶

Work in Progress

ciphersuites¶

Work in Progress

CIS¶

Work in Progress

CLARiiON¶

Work in Progress

cleartext¶

Work in Progress

CloudWatch¶

Work in Progress

ClusterLabs¶

Work in Progress

CLVM¶

Work in Progress

cLVMd¶

Work in Progress

cmd¶

Work in Progress

CMS¶

Work in Progress

CN¶

Work in Progress

codename¶

Work in Progress

colocation¶

Work in Progress

conffile¶

Work in Progress

config¶

Work in Progress

connectionless¶

Work in Progress

containerization¶

Work in Progress

corei¶

Work in Progress

coreutils¶

Work in Progress

corosync¶

Work in Progress

Corosync¶

Work in Progress

CPU¶

Work in Progress

CRL¶

Work in Progress

crmsh¶

Work in Progress

cron¶

Work in Progress

CronHowto¶

Work in Progress

crypto¶

Work in Progress

cryptographic¶

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CSR¶

Work in Progress

csync¶

Work in Progress

CTX¶

Work in Progress

CustomLog¶

Work in Progress

CVE¶

Work in Progress

CX¶

Work in Progress

DAC¶

Discretionary access control: A form of access control where the owner of a resource can grant/revoke permissions to other users.

daemonize¶

The process of converting a program to run in the background as a service, independent of user sessions.

DARPA¶

Defense Advanced Research Projects Agency: A research and development agency of the United States Department of Defense responsible for the development of emerging technologies for use in the military.

DASD¶

Direct Access Storage Device: The term was coined by IBM to refer to a type of storage that allow random access to storage (hard-drives, optical discs, …). It contrast with sequential access storage such as magnetic tape or punched card.

Datagram¶

In networking, a self contained, independent packet sent over a network. It can be routed from source to destination without relying on earlier or subsequent transfers.

dblink¶

Database Link: Connection between two databases (mainly Oracle and PostgreSQL), allowing one database to query data from the other.

ddeb¶

Work in Progress

DDNS¶

Dynamic domain name system: A service that automatically updates DNS records when the underlying IP address changes (aka, dynamic IP).

debconf¶

A configuration management system handling the configuration of software packages during installation or upgrades by prompting users for necessary settings and storing them for subsequent installations or updates.

deduplication¶

Process of removing duplicate copies of data in storage spaces. The redundant data is then replace with a reference to the original.

denylist¶

In cyber-security, a denylist is a list of entities (IP, domains, emails, …), that are explicitly denied access to a system or service.

DER¶

Distinguished Encoding Rules: An standardised encoding format for data (mostly cryptographic certificates and keys) for transmission and storage.

DGC¶

Distributed Garbage Collection: A process used in distributed systems to manage memory across multiple interconnected computers allowing identification and reclaiming of unused memory accross nodes.

DHCP¶

Dynamic Host Configuration Protocol: A network protocol used to automatically assign network configuration details (IP, DNS, gateway, …) to devices allowing for easy network management and connections within the network.

DHCPD¶

Dynamic Host Configuration Protocol Daemon: Server software responsible for assigning the network configuration via DHCP.

DIT¶

Directory Information Tree: In directory services (LDAP) it’s a hierarchical tree-like structure used to organize and store information.

DKMS¶

Dynamic Kernel Module Support: A framework used in Linux systems to automatically rebuild and install kernel modules when the kernel is updated.

DMA¶

Direct Memory Access: A technology that allows peripheral devices (hard drives, network cards, …) to access the system’s memory directly, bypassing the CPU and thus improving performance.

DMAR¶

Direct Memory Access Remapping: It is a technology used to control and secure Direct Memory Access (DMA) operations and ensures that devices can only access memory regions they are authorized to, helping to prevent unauthorized access, memory corruption, or security vulnerabilities. It is often used in virtualized environments to isolate devices between virtual machines (VMs) and the host system.

dmesg¶

A command in Linux systems that displays system logs related to hardware, drivers, and kernel events, such as system startup, device detection, and errors. It is commonly used for troubleshooting hardware issues and system diagnostics.

DN¶

Distinguished Name: In directory services (LDAP), it’s a unique identifier used to represent an entry in a directory, such as a user or a group. It’s often composed of sub-components like CN (Common Name), OU (Organisational Unit), DC (Domain Component).

DNS¶

Domain Name System: A system that translate human-readable domain names (canonical.com) to their IP addresses (185.125.190.20).

dnsmasq¶

A lightweight, open-source DNS (Domain Name System) and DHCP (Dynamic Host Configuration Protocol) server software.

DNSSEC¶

Domain Name System Security Extensions: DNSSEC is a set of security extensions to DNS which allow DNS data to be verified for authenticity and integrity.

Docker¶

One of the most popular containerization platforms, which allows developers to package applications - together with their dependencies - into lightweight containers. This provides a consistently reproducible environment for deploying applications.

DocumentRoot¶

A directive in web server configuration files that specifies the directory on the server where web files are stored (root location).

dpkg¶

dpkg is a package manager for Debian-based systems. It can install, remove, and build packages, but unlike other package management systems, it cannot automatically download and install packages – or their dependencies.

DRBD¶

Distributed Replicated Block Device: A software-based storage solution for Linux that allows for the mirroring of block devices between multiple hosts. The replication is transparent to other applications on the host systems. Any block device hard disks, partitions, RAID devices, logical volumes, etc can be mirrored.

DTLS¶

Datagram Transport Layer Security: A protocol that provides security for datagram-based communication, such as UDP. It is designed to offer similar security features as TLS but adapted for the connectionless nature of datagram protocols.

EAL¶

Environment Abstraction Layer: A software layer that provides a standardised interface between an operating system and the underlying hardware. It abstracts hardware-specific details, allowing software to run on different hardware platforms without modification.

ECKD¶

Extended Count Key Data: A disk storage format used by IBM mainframe systems, it provides advanced features such as better error detection and correction, as well as enhanced management of data records.

EFI¶

Extensible Firmware Interface: A type of firmware interface designed to initialize hardware and load the operating system during the boot process of a computer. Replacement for the older BIOS and ancestor of the UEFI.

ELinks¶

A text-based web browser for Unix-like operating systems. It allows users to browse the web in a terminal making it ideal for environments without a graphical user interface.

Engenio¶

A company that developed and manufactured storage systems including SAN and NAS. Later acquired by LSI Corporation and then by Seagate Technology.

EOL¶

End of life: When a product, service, software is no longer supported or maintained.

ERD¶

Enterprise Ready Drivers: Drivers that are specifically designed and optimized for use in enterprise environments, where stability, performance, and reliability are critical.

ESM¶

Expanded Security Maintenance: A support offering provided by Ubuntu, to extend security updates and patches for older versions of the operating system after its standard support period has ended.

ESXi¶

A bare-metal virtualization platform created by VMWare that enables multiple virtual machines to operate on a single physical server.

failover¶

In a Storage Area Network (SAN) environment, this occurs when data flows into an alternative I/O path because a cable, switch, or controller in the current path failed. It is a common feature in high availability environments and is handled (usually automatically) by multipathing software.

fallbacks¶

This is a manual or automatic switch to an alternative method, when the primary option fails or is less preferred.

FastCGI¶

Fast Common Gateway Interface (FastCGI) is an extension of the CGI protocol that starts a persistent FastCGI application process, allowing it to handle multiple requests instead of starting a new process for each request like a traditional CGI does.

FC¶

Fiber Channel (FC) is a storage networking protocol used for low-latency communication between a storage device and a node in a Storage Area Network (SAN).

FHS¶

Filesystem Hierarchy Standard (FHS) is a standard that defines the directory structure and contents in Linux and Unix-like operating systems.

FileSet¶

A FileSet defines a group of directories that will be included when performing a backup job using {term}`Bacula`.