yuval.guide — Guides and hands-on courses on DevOps, cloud, Linux, Python, Kubernetes, networking and AI.

The slides The tool is forty-two slides in five sections, after an introduction: Introduction: object storage beside block and file storage. 1. Buckets and objects: the bucket name as an ID, reaching a bucket over HTTPS, the object, tags on S3 and on every AWS resource, durability and consistency, object sizes and S3's …

The slides The tool is twenty-five slides: an introduction, then five sections, listed on its left. 0. Introduction IAM: identification, authentication, authorization: what IAM is, and the three steps every request goes through. 1. Identification The identities in an account: the root user, and the users, groups and …

The slides The tool is twelve slides, one picture each: Regions around the world: every Region on the map, coloured by partition. One Region: Israel (Tel Aviv): its AZs, its code, opt-in Regions, choosing a Region. A real Availability Zone, from the air: part of an AZ of us-west-2. The distance between Availability …

The slides The tool is a hands-on guide in seventeen slides, one step each, with the steps to follow beside a screenshot, a terminal or a picture of IAM's users and groups: Introduction: what the guide makes, and with which tool. 1. The account The AWS account: what it holds, its 12-digit ID, its card, and why …

The three roles In every OpenID Connect sign-in, a user wants to log in to an app, and the app lets a third party, the provider, say who the user is. The same three roles, whoever plays them: OpenID Provider: The party holding the identities and signing the token. It publishes its public keys at a fixed address, so …

The slides The tool is eleven slides, one picture each: Three ways into AWS: the console, the CLI and the SDKs send the same signed request. The AWS account: what it holds, its 12-digit ID, signing up, the bill. Signing in to the console: the root user and an IAM user. The console's top bar: the Services menu, search, …

An address and a prefix length divide 32 bits in two: the network bits, left of the prefix, and the host bits right of it. Splitting a network moves that line to the right. The workspace, at the top, holds one address: type its decimal values, flip its bits, and move its barriers. Under it, Original Network shows the …

Each section is one domain of the CCNA v1.1 (200-301) exam topics, with its share of the exam. The numbers are Cisco's topic numbers. The labs run in Cisco Packet Tracer: the Packet Tracer Guide installs it and builds a first network, step by step. The lab files are in the ccna repository. 1.0 Network Fundamentals …

Cisco Packet Tracer is a network simulator, and the CCNA labs on this site run in it. This guide builds one network from start to finish: One 2911 router. One 2960 switch. Two PCs. Install Packet Tracer Create a free account at Cisco Networking Academy. Sign in, open the Resource Hub and download Packet Tracer for your …

An event starts a run of every workflow file that accepts it, and each file's jobs then run on fresh machines. on: names a file's events, and its filters narrow them down. A job has no on:, so dividing jobs by event means dividing them into files. if: on a job reads inside the event, where a filter cannot: an …