jirutka

###############################################################################
# The MIT License
#
# Copyright 2012-2014 Jakub Jirutka <[email protected]>.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is

reikind

#!/bin/bash

usage() {

cat << EOT

  usage $0 [-hgw]
        $0 -m MESSAGE

  OPTIONS

netson

PSAD and UFW

Table of Contents

• What are we doing here?
• What is PSAD?
• What is UFW?
• Using PSAD and UFW
• Configure UFW logging rules
• Log prefix

jokey2k

#!/bin/bash
# based on script from http://www.axllent.org/docs/view/ssh-geoip
# License: WTFPL

# UPPERCASE space-separated country codes to ACCEPT
ALLOW_COUNTRIES="DE EU GB"
LOGDENY_FACILITY="authpriv.notice"

if [ $# -ne 1 ]; then
  echo "Usage:  `basename $0` <ip>" 1>&2

Tristor

# TCP port to bind to
# Change to a high/odd port if this server is exposed to the internet directly
Port 22

# Bind to all interfaces (change to specific interface if needed)
ListenAddress 0.0.0.0

# Force SSHv2 Protocol
Protocol 2

mattia-beta

### 1: Drop invalid packets ###
/sbin/iptables -t mangle -A PREROUTING -m conntrack --ctstate INVALID -j DROP

### 2: Drop TCP packets that are new and are not SYN ###
/sbin/iptables -t mangle -A PREROUTING -p tcp ! --syn -m conntrack --ctstate NEW -j DROP

### 3: Drop SYN packets with suspicious MSS value ###
/sbin/iptables -t mangle -A PREROUTING -p tcp -m conntrack --ctstate NEW -m tcpmss ! --mss 536:65535 -j DROP

### 4: Block packets with bogus TCP flags ###

nwaywood

#! /bin/bash

# ===================
# Script funtionality
# ===================

# do something
doSomething() {
    echo 'doing something'
}

tanaikech

Embedding Animation GIF in A Cell on Spreadsheet

This sample script is for embedding animation GIF in a cell using custom function on Spreadsheet.

I think that this method is one of various ideas.

Problem

There are some limitations.

1. Images of jpeg and png can be embedded in a cell using =IMAGE(). But when animation GIF is embedded using it, GIF is not played.

voluntas

### KERNEL TUNING ###

# Increase size of file handles and inode cache
fs.file-max = 2097152

# Do less swapping
vm.swappiness = 10
vm.dirty_ratio = 60
vm.dirty_background_ratio = 2

realslacker

#!/bin/bash

# to install directly from the Gist
# curl https://gist.githubusercontent.com/realslacker/6dce254e16003fbec5451689c9ba1e49/raw/ | bash -s -- -i

# test getopt
getopt --test > /dev/null
if [[ $? -ne 4 ]]; then
    echo "Error: `getopt --test` failed in this environment, please update to a newer 'getopt' package"
    exit 1