Reda NOUSHI noushi

Falsehoods programmers believe about time

This is a compiled list of falsehoods programmers tend to believe about working with time.

Don't re-invent a date time library yourself. If you think you understand everything about time, you're probably doing it wrong.

Falsehoods

There are always 24 hours in a day.
February is always 28 days long.
Any 24-hour period will always begin and end in the same day (or week, or month).

My Openshift Cheatsheet

Project Quotes, Limits and Templates

Cluster Quota

oc create clusterquota env-qa \
    --project-label-selector environment=qa \
    --hard pods=10,services=5
    
oc create clusterquota user-qa \

What / Why

Deploy key is a SSH key set in your repo to grant client read-only (as well as r/w, if you want) access to your repo.

As the name says, its primary function is to be used in the deploy process in replace of username/password, where only read access is needed. Therefore keep the repo safe from the attack, in case the server side is fallen.

How to

Generate a ssh key

Antonym List

Note: The table headings (positive/negative) are not necessarily meaningful.

Positive	Negative
`acquire`	`release`
`add`	`remove` (e.g. an item), `subtract` (arithmetic)
`advance`	`retreat`
`allocate`	`deallocate` (correct), `free` (common)
`allow`	`deny`

Install Vagrant

sudo su
apt-get update && apt-get install -y libvirt-dev ruby-all-dev apparmor-utils
curl -O -L https://dl.bintray.com/mitchellh/vagrant/vagrant_1.6.5_x86_64.deb
dpkg -i vagrant_1.6.5_x86_64.deb 
aa-complain /usr/lib/libvirt/virt-aa-helper # workaround
exit

	prompt = """
	Input: Print the current directory
	Output: pwd

	Input: List files
	Output: ls -l

	Input: Change directory to /tmp
	Output: cd /tmp

	/*
	This is a test server definition for GCE+Terraform for GH-9564
	*/

	provider "google" {
	project = "${var.project}" // Your project ID here.
	region = "${var.region}"
	}

	resource "google_compute_firewall" "gh-9564-firewall-externalssh" {

	# install aws cli first and configure it with credentials and default region
	# the script will iterate over all regions of AWS

	for region in `aws ec2 describe-regions --output text \| cut -f4`
	do
	echo -e "\nListing Instances in region:'$region'..."
	aws ec2 describe-instances --query "Reservations[].Instances[].{IP:PublicIpAddress,ID:InstanceId,Type:InstanceType,State:State.Name,Name:Tags[0].Value}" --output=table --region $region
	done

	{0: 'tench, Tinca tinca',
	1: 'goldfish, Carassius auratus',
	2: 'great white shark, white shark, man-eater, man-eating shark, Carcharodon carcharias',
	3: 'tiger shark, Galeocerdo cuvieri',
	4: 'hammerhead, hammerhead shark',
	5: 'electric ray, crampfish, numbfish, torpedo',
	6: 'stingray',
	7: 'cock',
	8: 'hen',
	9: 'ostrich, Struthio camelus',

	# ensure any xen virtual block devices named xvdN get a sdN symlink for consistency
	KERNEL=="xvd*", PROGRAM="/sbin/ec2udev-vbd %k", SYMLINK+="%c"