dpoulopoulos

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

    Input: List files
    Output: ls -l

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

junaidk

# 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

rafaeltuelho

My Openshift Cheatsheet

Openshift build secrets for cloning git repos using SSH Keys

• To create ssh secret:

oc create secret generic sshsecret \
    --from-file=ssh-privatekey=$HOME/.ssh/id_rsa

yrevar

{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',

zhujunsan

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

1. Generate a ssh key

maxtruxa

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

yuanying

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

Install vagrant-kvm as user

brianclements

#!/bin/bash

# options:
# remove stopped containers and untagged images
#   $ dkcleanup 
# remove all stopped|running containers and untagged images
#   $ dkcleanup --reset
# remove containers|images|tags matching {repository|image|repository\image|tag|image:tag}
# pattern and untagged images
#   $ dkcleanup --purge {image}

XVilka

Most updated version is always available at termstandard/colors repository.

Terminal Colors

There exists common confusion about terminal colors. This is what we have right now:

• Plain ASCII
• ANSI escape codes: 16 color codes with bold/italic and background
• 256 color palette: 216 colors + 16 ANSI + 24 gray (colors are 24-bit)
• 24-bit true color: "888" colors (aka 16 milion)

havenwood

Unscientific Benchmark

The Benchmark

def is_prime? n
  (2...n).all? { |i| n % i != 0 }
end

def sexy_primes n