| # created using both https://wiki.mozilla.org/Security/Guidelines/OpenSSH and https://stribika.github.io/2015/01/04/secure-secure-shell.html | |
| Protocol 2 | |
| # Supported HostKey algorithms by order of preference. | |
| HostKey /etc/ssh/ssh_host_ed25519_key | |
| HostKey /etc/ssh/ssh_host_rsa_key | |
| KexAlgorithms [email protected],diffie-hellman-group-exchange-sha256 |
Bitcoin's blockchain stores financial transactions.
Ethereum's block chain stores smart contracts.
A smart contract can store records on who owns what, it can store a promise to pay & promise to deliver.
It can also automatically move funds in accordance with instructions given long in the past.
You can check the blockchain to find if the house has been sold twice, who owns this land, what happens if the loan defaults etc
| # rabbitMQ password hashing algo as laid out in: http://lists.rabbitmq.com/pipermail/rabbitmq-discuss/2011-May/012765.html | |
| from __future__ import print_function | |
| import base64 | |
| import os | |
| import hashlib | |
| import struct | |
| # This is the password we wish to encode | |
| password = 'simon' |
| #!/usr/bin/env bash | |
| # copied from https://gist.github.com/lukebakken/7b4da46ed9abb7ed14f7a60b49f9e52e | |
| # discussion from here: https://groups.google.com/forum/#!topic/rabbitmq-users/Brx3tSmNC_8 | |
| set -o errexit | |
| set -o nounset | |
| declare -r passwd="${1:-newpassword}" |
| # rabbitMQ password hashing algo as laid out in: http://lists.rabbitmq.com/pipermail/rabbitmq-discuss/2011-May/012765.html | |
| #1.Generate a random 32 bit salt: | |
| import os | |
| salt = os.urandom(32) | |
| salt = ''.join(x.encode('hex') for x in salt) | |
| salt = salt.upper() | |
| #2.Concatenate that with the UTF-8 representation of the password (in this case "simon") | |
| simon = ''.join(x.encode('hex') for x in 'simon') |
| // create a paypal express checkout app | |
| 1. create a sandbox paypal app: https://developer.paypal.com/developer/applications (under REST API apps) | |
| 2. copy the app email([email protected]), client_id(Ac3vNqODzxe40U2kczQd92e4CGDor1SVM7GBfHzimCflhTaS6CtHW-jHMwys1RAKFzfLM-vX7xFPfCzo | |
| ) | |
| 3. use the client_id from above and replace it in the html_snippet below | |
| 4. configure webhooks for any events that occur: https://developer.paypal.com/docs/integration/direct/webhooks/rest-webhooks/ | |
| example of events that can occur-> https://developer.paypal.com/docs/integration/direct/webhooks/event-names/ | |
| 5. setup a Return URL - Target URL where users will be redirected after test transactions. Please allow up to 3 hours for the change to go into effect. | |
| 6. You will go through the same steps later on when you want to create the proper LIVE prod paypal. app |
| $ cat /etc/apt/sources.list.d/pritunl.list | |
| deb https://repo.pritunl.com/stable/apt xenial main | |
| sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com --recv 7568D9BB55FF9E5287D586017AE645C0CF8E292A | |
| sudo apt-get update | |
| sudo apt-get install pritunl-client-gtk | |
| # download profile(vpn config) | |
| # start pritunl client from apps |
Safe Operations For High Volume PostgreSQL: https://www.braintreepayments.com/blog/safe-operations-for-high-volume-postgresql
Zero downtime database migrations: https://www.rainforestqa.com/blog/2014-06-27-zero-downtime-database-migrations
Online migrations at scale: https://stripe.com/blog/online-migrations
Rails migrations, zero downtime: https://blog.codeship.com/rails-migrations-zero-downtime
| $ sudo apt -y install openvpn | |
| ## cat /etc/openvpn/client.conf | |
| remote <PUBLI_IP> 1194 | |
| proto udp | |
| ns-cert-type server | |
| client | |
| dev tun | |
| resolv-retry infinite |
| # delete branches that are older than x days | |
| # this will delete branches that havent received any commits that are newer than Aug 10, 2016 | |
| # see this answer for a bit more detail: http://stackoverflow.com/questions/10325599/delete-all-branches-that-are-more-than-x-days-weeks-old/39277210#39277210 | |
| for k in $(git branch -r | sed /\*/d); do | |
| if [ -z "$(git log -1 --since='Aug 10, 2016' -s $k)" ]; then | |
| branchnew=$(echo $k | sed -e "s/origin\///") | |
| echo deleting branch: $branchnew | |
| git push origin --delete $branchnew | |
| fi |