Yago Riveiro yriveiro

Installing ELK (CentOS)

This is a short step-by-step guide on installing ElasticSearch LogStash and Kibana Stack on a CentOS environment to gather and analyze logs.

I. Install JDK

rpm -ivh https://dl.dropboxusercontent.com/u/5756075/jdk-7u45-linux-x64.rpm

Recently CSS has got a lot of negativity. But I would like to defend it and show, that with good naming convention CSS works pretty well.

My 3 developers team has just developed React.js application with 6561 lines of CSS (and just 5 !important). During one year of development we had 0 issues with CSS. No refactoring typos, no style leaks, no performance problems, possibly, it is the most stable part of our application.

Here are main principles we use to write CSS for modern (IE11+) browsers:

SUIT CSS naming conventions + SUIT CSS design principles;
PostCSS + CSSNext. Future CSS syntax like variables, nesting, and autoprefixer are good enough;
Flexbox is awesome. No need for grid framework;
No DRY. It does not scale with CSS, just focus on better components;

1. Clone your fork:

git clone git@github.com:YOUR-USERNAME/YOUR-FORKED-REPO.git

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream

1. Clone your fork:

git clone git@github.com:YOUR-USERNAME/YOUR-FORKED-REPO.git

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream

Get ClamAV running on Mac OS X (using Homebrew)

The easiest way to get the ClamAV package is using Homebrew

$ brew install clamav

Before trying to start the clamd process, you'll need a copy of the ClamAV databases.

Create a freshclam.conf file and configure as so

	# Usage:
	# source iterm2.zsh

	# iTerm2 window/tab color commands
	# Requires iTerm2 >= Build 1.0.0.20110804
	# http://code.google.com/p/iterm2/wiki/ProprietaryEscapeCodes
	tab-color() {
	echo -ne "\033]6;1;bg;red;brightness;$1\a"
	echo -ne "\033]6;1;bg;green;brightness;$2\a"
	echo -ne "\033]6;1;bg;blue;brightness;$3\a"

	#!/bin/sh
	#To make use of this just copy it to your path, +x it, and do git sync
	MAIN_BRANCH="develop"

	CURRENT_CHANGES=`git status --porcelain`
	CURRENT_BRANCH=`git symbolic-ref -q --short HEAD`

	if [ "$CURRENT_CHANGES" != "" ]; then
	git stash --include-untracked
	fi

	command! CloseHiddenBuffers call s:CloseHiddenBuffers()
	function! s:CloseHiddenBuffers()
	let open_buffers = []

	for i in range(tabpagenr('$'))
	call extend(open_buffers, tabpagebuflist(i + 1))
	endfor

	for num in range(1, bufnr("$") + 1)
	if buflisted(num) && index(open_buffers, num) == -1

	Latency Comparison Numbers
	--------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	"
	" ██╗ ██╗ ██╗ ███╗ ███╗ ██████╗ ██████╗
	" ██║ ██║ ██║ ████╗ ████║ ██╔══██╗ ██╔════╝
	" ██║ ██║ ██║ ██╔████╔██║ ██████╔╝ ██║
	" ╚██╗ ██╔╝ ██║ ██║╚██╔╝██║ ██╔══██╗ ██║
	" ██╗╚████╔╝ ██║ ██║ ╚═╝ ██║ ██║ ██║ ╚██████╗
	" ╚═╝ ╚═══╝ ╚═╝ ╚═╝ ╚═╝ ╚═╝ ╚═╝ ╚═════╝
	"

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