isaacs

// See comments below.

// This code sample and justification brought to you by
// Isaac Z. Schlueter, aka isaacs

// standard style
var a = "ape",
  b = "bat",
  c = "cat",
  d = "dog",

dogmatic69

# ~/.bashrc: executed by bash(1) for non-login shells.
# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
# for examples

# If not running interactively, don't do anything
[ -z "$PS1" ] && return

# don't put duplicate lines in the history. See bash(1) for more options
# ... or force ignoredups and ignorespace
HISTCONTROL=ignoredups:ignorespace

jperras

Our root,
who art in Unix,
hallowed be thy shell.
Thy kernel come.
Thy commands be run
@localhost as they are in iNet.
Give us this day our daily updates,
And forgive us for our four-oh-threes,
as we forgive those who 403 against us.
And lead us not into segfaults,

ichikaway

Reference: http://mail-archives.apache.org/mod_mbox/httpd-announce/201108.mbox/raw/%3C20110824161640.122D387DD@minotaur.apache.org%3E/

cd apache_source_code/modules/metadata

apxs -c mod_headers.c

apxs -ian headers mod_headers.la

predominant

#!/bin/bash

###
# 
# Copyright (c) 2011 Cake Development Corporation (http://cakedc.com)
# 
# Ubuntu 11.04 based web server installation script
# Run this by executing the following from a fresh install of Ubuntu 11.04 server:
# 
#     bash -c "$(curl -fsSL https://raw.github.com/gist/1264701)" <mysqlPassword>

felixge

# Here a few bash one-liners that helped me analyze / fight a weak DOS attack against debuggable.com. Mostly for future reference.
# The attacker was opening lots of tcp connections without sending data, I believe it's called a SYN flood, see: http://tools.ietf.org/html/rfc4987#section-3.2

# Step 0: Check what is going on at port 80
$ netstat -tan | grep ':80 ' | awk '{print $6}' | sort | uniq -c

# Step 1: Increase the number of available fds
$ ulimit -n 32000

# Step 2: Restart your webserver, for me:

barraponto

#!/bin/bash

function actual_path() {
  if [ [ -z "$1" ] -a [ -d $1 ] ]; then
    echo $(cd $1 && test `pwd` = `pwd -P`)
    return 0
  else
    return 1
  fi
}

gasman

#!/usr/bin/env ruby -w

# pnginator.rb: pack a .js file into a PNG image with an HTML payload;
# when saved with an .html extension and opened in a browser, the HTML extracts and executes
# the javascript.

# Usage: ruby pnginator.rb input.js output.png.html

# By Gasman <http://matt.west.co.tt/>
# from an original idea by Daeken: http://daeken.com/superpacking-js-demos

jboner

Latency Comparison Numbers (~2012)
----------------------------------
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

ichikaway

bind -x '"\C-o": READLINE_LINE="${READLINE_LINE:0:$READLINE_POINT}
`git symbolic-ref HEAD | cut -d/ -f 3` ${READLINE_LINE:${READLINE_POINT}}"'