bom-d-van

Detecting and Mitigating DDOS Attacks

#List all Finish (FIN) packets
machine1 : sudo /usr/sbin/tcpdump -Nnn -i any -s0 'tcp[13] & 1 != 0'


#List all SYN and SYN-ACK packets
machine1 : sudo /usr/sbin/tcpdump -Nnn -i any -s0 'tcp[13] & 2 != 0' 

hrchu

# Configuration file for runtime kernel parameters.
# See sysctl.conf(5) for more information.

# See also http://www.nateware.com/linux-network-tuning-for-2013.html for
# an explanation about some of these parameters, and instructions for
# a few other tweaks outside this file.

# See evil packets in your logs.
net.ipv4.conf.all.log_martians = 1

kwilczynski

#!/bin/bash

set -u
set -e

set -o pipefail

export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

cat <<'EOF' > /etc/modprobe.d/blacklist-ipv6.conf

natelandau

#  ---------------------------------------------------------------------------
#
#  Description:  This file holds all my BASH configurations and aliases
#
#  Sections:
#  1.   Environment Configuration
#  2.   Make Terminal Better (remapping defaults and adding functionality)
#  3.   File and Folder Management
#  4.   Searching
#  5.   Process Management

tbjers

#!/bin/sh
available=$(free --mega -tw | grep "Total:" | awk '{print $4}')
ps -ylC httpd --sort:rss | awk -v avail="$available" '{ s += $8; } END { print "Average Size:", s/(NR-1)/1024, "MB,", NR-1, "Processes, Total usage:", (s/(NR-1)/1024)*(NR-1), "MB, Max Servers:", avail/(s/(NR-1)/1024) }'

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

davatron5000

Backstory: I decided to crowdsource static site generator recommendations, so the following are actual real world suggested-to-me results. I then took those and sorted them by language/server and, just for a decent relative metric, their Github Watcher count. If you want a heap of other projects (including other languages like Haskell and Python) Nanoc has the mother of all site generator lists. If you recommend another one, by all means add a comment.

Ruby

• Jekyll 5,676
• Octopress 2,696
• Middleman 685
• NestaCMS 664
• Statis 509
• Nanoc 355

wardbekker

# Split MYSQL dump file

zcat dump.sql.gz | awk '/DROP TABLE IF EXISTS/{n++}{print >"out" n ".sql" }'

# Parallel import using GNU Parallel http://www.gnu.org/software/parallel/

ls -rS *.sql | parallel --joblog joblog.txt mysql -uXXX -pYYY db_name "<"