---
title: Developer Copy-Paste Guides: Terminal, UUIDs, JWTs | Relic
description: Practical developer explainers and how-tos: copy and paste in the terminal, what a UUID, JWT, hash and Base64 actually are, and how to copy a file path.
canonical: https://relic.space/blog/topics/dev-toolbox
source: https://relic.space/llms.txt
---
Topic

# Copy, paste and the developer toolbox

Developers copy and paste all day: commands, tokens, snippets and paths. Terminal tricks come first, then plain-English explainers for the formats you handle constantly.

Start here

[Pillar·13 minHow to copy and paste in the terminalCtrl C cancels a command in the terminal, so copy and paste works differently there. Shortcuts for every terminal, plus SSH, PuTTY, Termius and browser terminals.Read ](https://relic.space/blog/copy-and-paste-in-the-terminal)

In this topic

[7 minWhat is a UUID?A UUID is a 128-bit value designed to be unique without any central authority handing it out. What they are, how the versions differ, and when to reach for one.Read ](https://relic.space/blog/what-is-a-uuid)[7 minWhat is a JWT token?A JWT packs a user's identity into a signed, self-contained token. What the three parts hold, how the signature works, and what a JWT does and does not protect.Read ](https://relic.space/blog/what-is-a-jwt-token)[8 minWhat is a hash function?A hash function squeezes any input into a short, fixed fingerprint you cannot reverse. What hashing is, how it differs from encryption, and where it shows up.Read ](https://relic.space/blog/what-is-a-hash-function)[6 minWhat is Base64 encoding?Base64 rewrites binary data as plain text so it survives systems that only expect text. What it does, why it is not encryption, and where you will meet it.Read ](https://relic.space/blog/what-is-base64-encoding)[8 minHow to copy a file pathCopying a file's full path is a two-second job once you know the shortcut. The menu trick, keyboard method and terminal command, on both Windows and Mac.Read ](https://relic.space/blog/how-to-copy-a-file-path)[7 minHashing vs encryption: what is the difference?Hashing and encryption sound interchangeable but solve opposite problems: one is one-way, the other is meant to be undone. The difference, and why it matters.Read ](https://relic.space/blog/hashing-vs-encryption)