Kha Nguyen lotusirous

Generate SSH public and private SSH key:

Follow this tutorial: https://help.github.com/articles/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent/

Add key to agent

https://help.github.com/articles/adding-a-new-ssh-key-to-your-github-account/

Change remote origin to ssh style

Your git config is similar to this:

Install Elasticsearch in CentOS 7

Download and install rpm file downloaded from oracle home page

# install by command
rpm -ivh jdk-8u151-linux-x64.rpm
# Check java version
java -version

Forward localhost service by a public ip

I have a service that listen on http://127.0.0.1:1017. This service is a binary file which can not change IP/port when turn it on.

`socat` for public this service by ip

socat TCP-LISTEN:8080,fork,reuseaddr TCP:127.0.0.1:1017

Set up docker private registry
Options

Set up docker private registry

Group by and count transaction within a period

Source: https://stackoverflow.com/questions/47362530/python-pandas-group-datetimes-by-hour-and-count-row

df.date=pd.to_datetime(df.date)
df.groupby([pd.Grouper(key='date',freq='H'),df.station]).size().reset_index(name='count')
Out[235]: 
                 date station  count
0 2017-10-30 15:00:00 A 2

	from flask import Flask
	from flask import json, Response

	"""
	From: https://youtu.be/1ByQhAM5c1I

	Refer to another repos:
	- https://github.com/pallets/flask/tree/master/examples/flaskr
	- https://github.com/wgwz/flask-for-fun-and-profit
	"""

	import socket
	from flask import Flask
	app = Flask(__name__)


	@app.route("/")
	def hello():
	hostname = socket.gethostname()
	ipaddr = socket.gethostbyname(hostname)
	return """

	# Time
	yum -y install ntp
	ntpdate time.apple.com

	# remove old kernel
	yum install yum-utils
	package-cleanup --oldkernels --count=2

	# disable ipv6
	# append in file `/etc/sysctl.conf`

	import ipaddress
	from voluptuous.schema_builder import message
	from voluptuous import All, Invalid, Required, Schema
	from voluptuous.error import Invalid

	class IPInvalid(Invalid):
	"""The value is not valid IP."""


	@message('expected an IP address', cls=IPInvalid)