rhelmer

Using aws-cli and jq

list all instances for all ASGs

aws autoscaling describe-auto-scaling-instances \
  | jq '.AutoScalingInstances[] | {AutoScalingGroupName, InstanceId}'

list instance IDs for a particular ASG

mingfang

openssl rsa -in ~/.ssh/id_rsa -outform pem > id_rsa.pem
chmod 600 id_rsa.pem

syphernl

#!/usr/bin/env php -n
<?php
function apache_vhosts($binary='/usr/sbin/apache2ctl')
{
  $command = " -S 2>&1 | grep 'port ' | awk {'print $2,$4'} | sort -u -t' ' -k2,2 | grep -v 'localhost'";
  $vhosts = shell_exec(sprintf("%s %s", $binary, $command));
  $vhosts = explode("\n", trim($vhosts));

  $results = array();
  foreach($vhosts as $vhost)

paskal

# read more at https://terrty.net/2014/ssl-tls-in-nginx/
# latest version on https://gist.github.com/paskal/628882bee1948ef126dd/126e4d1daeb5244aacbbd847c5247c2e293f6adf
# security test score: https://www.ssllabs.com/ssltest/analyze.html?d=terrty.net
# your nginx version might not have all directives included, test this configuration before using in production against your nginx:
# $ nginx -c /etc/nginx/nginx.conf -t

server {
        # public key, contains your public key and class 1 certificate, to create:
        # (example for startssl)
        # $ (cat example.com.pem & wget -O - https://www.startssl.com/certs/class1/sha2/pem/sub.class1.server.sha2.ca.pem) | tee -a /etc/nginx/ssl/domain.pem > /dev/null

kenjij

# Download the legacy format for NGINX compatibility
wget http://geolite.maxmind.com/download/geoip/database/GeoLiteCountry/GeoIP.dat.gz
wget http://geolite.maxmind.com/download/geoip/database/GeoLiteCity.dat.gz
# Unzip
gunzip Geo*.gz
# Copy to /usr/share/GeoIP/
cp Geo*.dat /usr/share/GeoIP/

awaxa

---
sockets:
  - id: 'one'
    address: '127.0.0.1'
    port: '8001'
  - id: 'two'
    address: '127.0.0.2'
    port: '8002'

hummus

wget http://stedolan.github.io/jq/download/linux64/jq 
aws ec2 describe-instances --filters "Name=tag:Name,Values=$NAME" \
  "Name=instance-state-name,Values=running" \
  |  jq -r \
  ".Reservations[] | .Instances[] | .InstanceId" \

aws ec2 describe-volumes --filters \
  "Name=status,Values=available" \
  | jq -r ".Volumes[] | .VolumeId" \

denji

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

jeffersonmartin

Guacamole 0.8.3 Instructions

These instructions were written for Ubuntu 12.04 LTS, herein referred to as guac-server.

Install Tomcat Server and Pre-Requisite Packages

Once your Ubuntu 12.04 LTS VM has been installed and the network has been configured, you will need to install the tomcat server and the latest guacamole release. As of this writing, we are using the binary (.war) of Guacamole 0.8.3.

1. Install the tomcat6 server
   # apt-get update
# apt-get install tomcat6

omeinusch

#!/bin/bash
PASS=`pwgen -s 40 1`

mysql -uroot <<MYSQL_SCRIPT
CREATE DATABASE $1;
CREATE USER '$1'@'localhost' IDENTIFIED BY '$PASS';
GRANT ALL PRIVILEGES ON $1.* TO '$1'@'localhost';
FLUSH PRIVILEGES;
MYSQL_SCRIPT