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Merged
s-makin merged 12 commits into from
Jan 30, 2026
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Expand glossary entries with detailed descriptions letter T #427

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Expand glossary entries with detailed descriptions letter T
MariaBego56 Dec 7, 2025
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Update docs/reference/glossary.md
MariaBego56 Dec 14, 2025
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MariaBego56 Dec 14, 2025
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Improve glossary entries for clarity
MariaBego56 Dec 15, 2025
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Refine TGT definition in glossary
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MariaBego56 Jan 24, 2026
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s-makin Jan 30, 2026
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51 changes: 27 additions & 24 deletions docs/reference/glossary.md
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Expand Up @@ -2338,15 +2338,15 @@ Systemd

tasksel
Task selector
*Work in Progress*
Tasksel is a Debian/Ubuntu tool that simplifies the installation of collections of related packages (called "tasks") for specific purposes, like setting up a mail server, LAMP stack, or desktop environment. Instead of manually installing dozens of packages, tasksel lets you install entire pre-configured software bundles with a single command.

TB
Terabyte (unit of measurement)
1 TB = 1024 {term}`GB`

TCP
Transmission Control Protocol
*Work in Progress*
TCP is one of the core protocols of the Internet Protocol Suite, providing reliable, ordered, and error-checked delivery of data between applications over a network. It is the "reliable" protocol that most internet applications depend on. You use {term}`TCP` whenever you need to be sure your data arrives intact and in order.

TDX
Trust domain extensions
Expand All @@ -2363,61 +2363,64 @@ Trusted Execution Environment

TFTP
Trivial File Transfer Protocol
*Work in Progress*
TFTP is a very simple, lightweight file transfer protocol that uses {term}`UDP` instead of {term}`TCP`, designed for basic file transfers where simplicity is more important than features or security. It is "trivial" because it has minimal functionality - no authentication, no encryption, no directory listing, just basic reading and writing of files.

TGS
Ticket Granting Service
*Work in Progress*
TGS is a credential issued by Kerberos used in the Kerberos authentication protocol, a key component of the Key Distribution Center (KDC) that issues service tickets to clients after initial authentication.

TGT
Ticket Granting Ticket
*Work in Progress*

TGT is a credential issued by Kerberos authentication systems. TGT allows users to request service tickets without re-entering their password.
TLB
Translation Lookaside Buffer
TLB is a {term}`CPU` cache that stores recent page table entries. When the
CPU translates a virtual address, it first checks the TLB. If the mapping is
found, the translation is fast. If it's missing, the CPU retrieves the
mapping from the page table in memory, which takes longer.
TLB is a specialized cache in the {term}`CPU` that stores recent virtual-to-physical address translations, dramatically speeding up memory access by avoiding repeated page table lookups. It is a critical component of virtual memory systems that makes address translation fast enough to be practical. When the CPU translates a virtual address, it first checks the TLB. If the mapping is found, the translation is fast. If it is missing, the CPU retrieves the mapping from the page table in memory, which takes longer.

TLS
Transport Layer Security
*Work in Progress*
TLS is a cryptographic protocol that provides secure communication over a network by encrypting data transmitted between clients and servers. It is the successor to SSL (Secure Sockets Layer) and is what makes {term}`HTTPS` secure (the padlock icon in your browser).

tmpfs
Temporary Filesystem
*Work in Progress*
tmpfs is a filesystem that stores all files in virtual memory (RAM) instead of on a physical disk, making it fast but also volatile - data disappears when the system reboots or loses power.

tmux
Terminal Multiplexer
*Work in Progress*
tmux is a powerful command-line tool that allows you to manage multiple terminal sessions from a single window, with the ability to detach and reattach sessions. It is a way to have multiple terminal windows and split-screen layouts, all within a single terminal, with sessions that persist even when you disconnect.

topologies
*Work in Progress*
Topologies (in a networking context) refer to the physical or logical arrangement of devices and connections in a network - essentially how computers, switches, routers, and other devices are interconnected.

TOTP
Time-based One-Time Password
*Work in Progress*
TOTP is an algorithm that generates temporary, single-use passwords based on the current time and a shared secret key. It is one of the most common forms of two-factor authentication (2FA) used by apps like Google Authenticator, Microsoft Authenticator, and many others.

TPM
Trusted Platform Module
A hardware security chip that securely stores cryptographic keys, measures
system integrity during boot, and enables features such as secure storage,
encryption, and attestation.
A hardware security chip that securely stores cryptographic keys, measures system integrity during boot, and enables features such as secure storage,
encryption, and attestation.

traceback
*Work in Progress*
Traceback
traceback is a term used in Python. Traceback is a report of the function call stack printed when an exception occurs. It shows the sequence of calls leading to the error, including file names, line numbers, and the exception type. It helps developers identify and debug issues by tracing execution backward from the failure point.

Traceroute
*Work in Progress*
Traceroute is a network diagnostic tool that shows the path packets take from your computer to a destination across the internet, revealing each hop (router) along the way.

ttys
TTYS
Teletype Terminals
*Work in Progress*
TTYS were electromechanical typewriter-like devices used as input/output terminals for telegraph networks and early computers. They sent and received text over serial lines, printing characters on paper instead of displaying them on a screen. Even though the physical machines are mostly gone, the term TTY still exists in Unix/Linux systems to represent:
* A text-based input/output device
* A terminal session
* A console connection

TXT
Trusted Execution Technology
*Work in Progress*
TXT is Intel's hardware-based security technology that creates a trusted execution environment to protect systems from software-based attacks. In other words, TXT was designed to make sure that a computer boots into a trusted and verified state before loading the operating system or applications.
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@slyon slyon Dec 9, 2025

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question: Should we make a cross-reference to the newer "Intel TDX" technology here?

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@MariaBego56 MariaBego56 Dec 14, 2025

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Yes! good idea :-)

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@s-makin s-makin Jan 5, 2026

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The TDX definition PR has now been merged, so it should be possible to add a link to that term here :)

It protects against:
* Rootkits
* Boot-level malware
* Unauthorized changes to firmware or system software

:::

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