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#!/bin/bash
# -r recursive 
# -z use compression - turn this off if server need to conserve memory
# -t preserve modification times
# -p preserve permissions
# -l copy symlinks as symlinks

# Sync the files from the source to target folder and delete any extraneous folders
rsync -rvztpl --delete --stats --rsh=/usr/bin/ssh . sshalias:/var/sites/fooooobarbar.com

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Recently, I use JMXterm to collect info about Java JVM via JMX and MBeans. Here is a short note.

- Download JMXterm
https://sourceforge.net/projects/cyclops-group/files/jmxterm/1.0.0/jmxterm-1.0.0-uber.jar/download

- Run JMXterm
java -jar jmxterm-1.0.0-uber.jar --url localhost:<jmx listen port>

- All MBeans from java.lang
$>domain java.lang

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#!/bin/bash
## Bash Script to clear cached memory on (Ubuntu/Debian) Linux
## By Philipp Klaus
## see <http://blog.philippklaus.de/2011/02/clear-cached-memory-on-ubuntu/>

if [ "$(whoami)" != "root" ]
then
  echo "You have to run this script as Superuser!"
  exit 1
fi

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# source: https://trac.ffmpeg.org/wiki/CentosCompilationGuide

yum install autoconf automake gcc gcc-c++ git libtool make nasm pkgconfig zlib-devel

mkdir ~/ffmpeg_sources

cd ~/ffmpeg_sources
curl -O http://www.tortall.net/projects/yasm/releases/yasm-1.2.0.tar.gz
tar xzvf yasm-1.2.0.tar.gz
cd yasm-1.2.0

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This is a quick set-up guide on how to install Icecast for Mp3 and Ogg streaming, sort of online radio. Tested on Debian Wheezy. Probably works on Ubuntu, etc. Icecast is a "server-like". It offers the HTTP URL/port through which end-users can play the media. However, Icecast itself does not serve the files. It must get its input from other "client-like" software. For example, Ices0 sends mp3 input to Icecast and then Icecast delivers to the end user. Similarly, Ices2 sends ogg input to Icecast and then Icecast delivers to the end user.

Set up icecast

Start by installing:

sudo apt-get install icecast2

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How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

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Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096

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Integrate Gem/Engine and main Rails app

Overview

• Paths
• Routes
• Add functionality to controller
• Improving (Extending or overriding) Engine functionality
• Helpers
• Assets

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#!/bin/bash

# Usage
# First create an encrypted password to be used as connection pass
# and pass as a parameter with the script. To create use: slappasswd

# Clean packages
sudo yum clean all
# Install openldap as service manager
sudo yum -y install openldap-servers openldap-clients

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yum install libmpc-devel mpfr-devel gmp-devel

cd /usr/src/
curl ftp://ftp.mirrorservice.org/sites/sourceware.org/pub/gcc/releases/gcc-4.9.3/gcc-4.9.3.tar.bz2 -O
tar xvfj gcc-4.9.3.tar.bz2
cd gcc-4.9.3
./configure --disable-multilib --enable-languages=c,c++
make -j `grep processor /proc/cpuinfo | wc -l`
make install