jmcabandara

1. Get your IP Address

echo `ifconfig $(netstat -nr | grep -e default -e "^0\.0\.0\.0" | head -1 | awk '{print $NF}') | grep -e "inet " | sed -e 's/.*inet //' -e 's/ .*//' -e 's/.*\://'`

2. Modify your hosts file

jmcabandara

#!/usr/bin/env bash
set -ex
toolset=devtoolset-7

yum install -y epel-release # EPEL repo
yum install -y centos-release-scl # shiny-new(er) compliers
# make sure there are no surprises installing from repos
grep -r gpgkey= /etc/yum.repos.d/ | cut -d= -f2 | xargs -L1 rpm --import
yum update -y # system update
# misc dev tools, but we're not going to use the ancient toolchain

jmcabandara

To execute any linux command in background we use nohup. But the problem with scp command is that it prompts for the password (if password authentication is used). So to make scp execute as a background process do this:


1>
$ nohup scp file_to_copy user@server:/path/to/copy/the/file > nohup.out 2>&1
if it prompts for password then enter password.
Then press ctrl + z which will temporarily suspend the command, 


SCP will give output:

jmcabandara

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

jmcabandara

#!/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

jmcabandara

Integrate Gem/Engine and main Rails app

Overview

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

jmcabandara

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

jmcabandara

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.

jmcabandara

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

jmcabandara

# 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