Om Prakash Singh omps

Windows Docker Kubernetes Commands for Linux Admins

1.a. Find windows system path on windows terminal Run path command on any cmd prompt and this should print the path output, tested on windows 10

D:\> path

1.b. Find and temporarily modify windows system path on powershell windows 10

PS D:\> $env:Path

Simple Postfix MTA Setup for headless hobbyists

So, you're a hobbyist or maybe even a user in a small-scale business capacity and you have some kind of headless Linux (or other *nix) box, maybe it's a VPS or a Raspberry Pi, and you want it to be able to email you with alerts (setting up monitoring is a separate subject!)

History

I went round in circles with this for a while, because it seemed like such a

Kubernetes Practice questions

Core Concepts

Create a namespace called 'mynamespace' and a pod with image nginx called nginx on this namespace
Create the pod that was just described using YAML
Create a busybox pod (using kubectl command) that runs the command "env". Run it and see the output
Create a busybox pod (using YAML) that runs the command "env". Run it and see the output
Get the YAML for a new namespace called 'myns' without creating it
Create the YAML for a new ResourceQuota called 'myrq' with hard limits of 1 CPU, 1G memory and 2 pods without creating it
Get pods on all namespaces
Create a pod with image nginx called nginx and expose traffic on port 80

CKAD

🔧 Application Development and Deployment

Create a multi-container Pod with a sidecar logging container that tails logs from the main app container.

multi container pod can be created only by usingYAML or JSON formatted configuration file.
```
kubectl create -f FILE
```

	// Unfollow everyone on twitter.com, by Jamie Mason (https://twitter.com/fold_left)
	// https://gist.github.com/JamieMason/7580315
	//
	// 1. Go to https://twitter.com/YOUR_USER_NAME/following
	// 2. Open the Developer Console. (COMMAND+ALT+I on Mac)
	// 3. Paste this into the Developer Console and run it
	//
	// Last Updated: 09 April 2020
	(() => {
	const $followButtons = '[data-testid$="-unfollow"]';

	Based on the latest comment https://github.com/microsoft/vscode/issues/68167 I have modified JerryGoyal's answer so we don't have to modify bindings:

	Put the following at the top of your Microsoft.PowerShell_profile.ps1 config file (type $profile in the terminal to find it, you might have to create one if it doesn't exist already)

	```PowerShell_profile
	if ($env:TERM_PROGRAM -eq "vscode") {
	Set-PSReadLineOption -EditMode Emacs
	}

	This works for me (vscode 1.43)


	Questions are not from any actual exam!!!



	Q: Create a job that calculates pi to 2000 decimal points using the container with the image named perl
	and the following commands issued to the container: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"]
	Once the job has completed, check the logs to and export the result to pi-result.txt.

	Solution:

	1. Worker node is connected but doesn't have any role defined.
	```
	kubectl label node k8s-node1 node-role.kubernetes.io/worker=worker
	```