yuval.guide — Guides and hands-on courses on DevOps, cloud, Linux, Python, Kubernetes, networking and AI.
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 …
Read MoreThis guide opens an AWS account and does the first real things with it: Open the account and protect it. Create an S3 bucket in the console and upload a file. See the same bucket from CloudShell, then from the AWS CLI on your own computer. Delete what you made. It takes about an hour. The slides The AWS Console, CLI …
Read MoreThe 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 …
Read MoreThe 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, …
Read MoreAn 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 …
Read MoreEach 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 …
Read MoreCisco 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 …
Read MoreAn 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 …
Read MoreThe crew and its repository The viewer replays agentmon, a repository that runs on one machine with Docker Compose. The crew: four CrewAI agents, one topic at a time ( crew/). Planner: plans a short report on the topic. Researcher: finds three facts with its search tool. Writer: writes one paragraph from the facts. …
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