kixorz

"UserData": {
  "Fn::Base64": { "Fn::Join":["", [
    "#!/bin/bash -ex\n",
    "apt-get update\n",
    "apt-get -y install python-setuptools\n",
    "mkdir aws-cfn-bootstrap-latest\n",
    "curl https://s3.amazonaws.com/cloudformation-examples/aws-cfn-bootstrap-latest.tar.gz | tar xz -C aws-cfn-bootstrap-latest --strip-components 1\n",
    "easy_install aws-cfn-bootstrap-latest\n",
    "/usr/local/bin/cfn-init --stack ", { "Ref":"AWS::StackName" }, " --resource WebServer", " --region ", { "Ref": "AWS::Region" }, "\n",
    "\n",

heathermiller

A nicer Terminal experience.

Just add the following to your bash profile.

export PS1='\[\033[38;5;202;48;5;0m\]⏣ \[\033[38;5;134;48;5;0m\]\w \[\033[38;5;112;48;5;0m\]`git branch 2> /dev/null | grep -e ^* | sed -E  s/^\\\\\*\ \(.+\)$/\(\\\\\1\)\ /`\[\033[00m\]'

(The green bit there is the current branch you're on if you're in a directory that has a git repository within it)

lelandbatey

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

ajantis

import akka.actor._
import scala.concurrent.duration._
import scala.concurrent.Future

object MyApp extends App {
  val actorSystem = ActorSystem()
  val myActor = actorSystem.actorOf(Props[MyActor])
  myActor ! "Hello!"
}

mapopa

Don't use MongoDB

I've kept quiet for awhile for various political reasons, but I now feel a kind of social responsibility to deter people from banking their business on MongoDB.

Our team did serious load on MongoDB on a large (10s of millions of users, high profile company) userbase, expecting, from early good experiences, that the long-term scalability benefits touted by 10gen

earthgecko

#!/bin/bash
# bash generate random alphanumeric string
#

# bash generate random 32 character alphanumeric string (upper and lowercase) and 
NEW_UUID=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1)

# bash generate random 32 character alphanumeric string (lowercase only)
cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 32 | head -n 1

nherment

#!/bin/bash
# herein we backup our indexes! this script should run at like 6pm or something, after logstash
# rotates to a new ES index and theres no new data coming in to the old one. we grab metadatas,
# compress the data files, create a restore script, and push it all up to S3.
TODAY=`date +"%Y.%m.%d"`
INDEXNAME="logstash-$TODAY" # this had better match the index name in ES
INDEXDIR="/usr/local/elasticsearch/data/logstash/nodes/0/indices/"
BACKUPCMD="/usr/local/backupTools/s3cmd --config=/usr/local/backupTools/s3cfg put"
BACKUPDIR="/mnt/es-backups/"
YEARMONTH=`date +"%Y-%m"`