komuw

#https://www.zeitgeist.se/2013/11/22/strongswan-howto-create-your-own-vpn/
#https://www.gypthecat.com/ipsec-vpn-host-to-host-on-ubuntu-14-04-with-strongswan
#Example of simple pre-shared keys vpn setup: https://www.strongswan.org/uml/testresults/ikev2/rw-psk-ipv4/

$ sudo apt-get -y install strongswan
$ ipsec version
	Linux strongSwan U5.1.2/K3.13.0-55-generic
	Institute for Internet Technologies and Applications
	University of Applied Sciences Rapperswil, Switzerland
	See 'ipsec --copyright' for copyright information.

komuw

1. intro, download, install & setup
2. basics, syntax
3. control flow
4. more types, data structures
5. methods & interfaces
6. concurrency
7. nice to know stuff
8. golang gotchas <-- especially if you are coming from python, ruby etc
9. workspace

komuw

- name: install newer nginx and ovveride old config file
  shell: sudo apt-get -y -o Dpkg::Options::=--force-confnew install nginx
  notify: restart nginx

komuw

`pip install pycrypto`

from Crypto.Cipher import DES3
from Crypto import Random
key = 'Sixteen byte key'
iv = Random.new().read(DES3.block_size) #DES3.block_size==8
cipher_encrypt = DES3.new(key, DES3.MODE_OFB, iv)
plaintext = 'sona si latine loqueri  ' #padded with spaces so than len(plaintext) is multiple of 8
encrypted_text = cipher_encrypt.encrypt(plaintext)

komuw

from Crypto.Cipher import AES
from Crypto import Random
import base64

block_size = AES.block_size


#unpad = lambda s : s[0:-ord(s[-1])]

def pad(plain_text):

komuw

# 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

komuw

$ 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

komuw

1. Safe Operations For High Volume PostgreSQL: https://www.braintreepayments.com/blog/safe-operations-for-high-volume-postgresql

2. • https://medium.com/paypal-tech/postgresql-at-scale-database-schema-changes-without-downtime-20d3749ed680
   • https://gist.github.com/jcoleman/1e6ad1bf8de454c166da94b67537758b

3. Zero downtime database migrations: https://www.rainforestqa.com/blog/2014-06-27-zero-downtime-database-migrations

4. Online migrations at scale: https://stripe.com/blog/online-migrations

5. Rails migrations, zero downtime: https://blog.codeship.com/rails-migrations-zero-downtime

komuw

$ 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

komuw

// 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