plentz

# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048

debasishg

General Background and Overview

1. Probabilistic Data Structures for Web Analytics and Data Mining : A great overview of the space of probabilistic data structures and how they are used in approximation algorithm implementation.
2. Models and Issues in Data Stream Systems
3. Philippe Flajolet’s contribution to streaming algorithms : A presentation by Jérémie Lumbroso that visits some of the hostorical perspectives and how it all began with Flajolet
4. Approximate Frequency Counts over Data Streams by Gurmeet Singh Manku & Rajeev Motwani : One of the early papers on the subject.
5. [Methods for Finding Frequent Items in Data Streams](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.187.9800&rep=rep1&t

dperini

//
// Regular Expression for URL validation
//
// Author: Diego Perini
// Created: 2010/12/05
// Updated: 2018/09/12
// License: MIT
//
// Copyright (c) 2010-2018 Diego Perini (http://www.iport.it)
//

mwhite

The Ultimate Git Alias Setup

If you use git on the command-line, you'll eventually find yourself wanting aliases for your most commonly-used commands. It's incredibly useful to be able to explore your repos with only a few keystrokes that eventually get hardcoded into muscle memory.

Some people don't add aliases because they don't want to have to adjust to not having them on a remote server. Personally, I find that having aliases doesn't mean I that forget the underlying commands, and aliases provide such a massive improvement to my workflow that it would be crazy not to have them.

The simplest way to add an alias for a specific git command is to use a standard bash alias.

# .bashrc

rantoniuk

namespace :db do  desc "Backup project database. Options: DIR=backups RAILS_ENV=production MAX=7" 
  task :backup => [:environment] do
    datestamp = Time.now.strftime("%Y-%m-%d_%H-%M-%S")    
    base_path = Rails.root
    base_path = File.join(base_path, ENV["DIR"] || "backups")
    backup_base = File.join(base_path, 'db_backups')
    backup_folder = File.join(backup_base, datestamp)
    backup_file = File.join(backup_folder, "#{RAILS_ENV}_dump.sql")    
    FileUtils.mkdir_p(backup_folder)    
    db_config = ActiveRecord::Base.configurations[RAILS_ENV]    

bertspaan

Python script to convert DBF database file to CSV

• First download dbfpy: http://sourceforge.net/projects/dbfpy/files/latest/download?source=files
• Then install: sudo python setup.py install

To convert DBF file to CSV:

./dbf2csv database.dbf

dominicsayers

What I actually did

/etc/security/limits.conf

elasticsearch hard memlock 100000

/etc/default/elasticsearch

drorata

# Initialize the scroll
page = es.search(
  index = 'yourIndex',
  doc_type = 'yourType',
  scroll = '2m',
  search_type = 'scan',
  size = 1000,
  body = {
    # Your query's body
    })

SuneKjaergaard

#!/bin/bash
line=$(tail -1 /var/log/myapp/myapp.uwsgi.log)
substr='uWSGI listen queue of socket'

if test "${line#*$substr}" != "$line"
then
	#We're using upstart, could be easily adapted to fx systemd
	# Adding a log statement to keep track of when this happens. Remember to create the monitor dir
	/sbin/initctl restart myapp > /var/log/myapp/monitor/uwsgi-monitor.log 2>&1
	echo "$(date) restarted myapp due to listen queue error" >> /var/log/myapp/monitor/uwsgi-monitor.log

jessedearing

#!/bin/bash
echo "Generating an SSL private key to sign your certificate..."
openssl genrsa -des3 -out myssl.key 1024

echo "Generating a Certificate Signing Request..."
openssl req -new -key myssl.key -out myssl.csr

echo "Removing passphrase from key (for nginx)..."
cp myssl.key myssl.key.org
openssl rsa -in myssl.key.org -out myssl.key