Red5d

function mempercent {
  total=$(free -m | sed -n '2p' | awk '{print $2}')
  used=$(free -m | sed -n '3p' | awk '{print $4}')
  echo $(echo $(echo 'scale=2;'$used'/'$total'' | bc)*100 | bc | cut -d'.' -f1)"% memory usage (${used}M Used / ${total}M Total)"
}

function systemload {
  loadAverage=$(uptime | cut -d',' -f4 | grep -o "[0-9]*\.[0-9]*$")
  processors=$(cat /proc/cpuinfo | grep processor | tail -n1 | awk '{ print $3 }')
  let processors=$processors+1

Red5d

# Scan network range (replace with yours) for MAC addresses, compare with previous scan, and report differences with PushBullet.
# Requires pushbullet bash script from https://github.com/Red5d/pushbullet-bash

touch prev-macs.txt
sudo nmap -sP -n 192.168.1.1/24 | grep "MAC Address" | sort > macs.txt
if [ $(diff macs.txt prev-macs.txt) ];then
    pushbullet push all note "New network devices: $(diff macs.txt prev-macs.txt)"
fi
mv macs.txt prev-macs.txt

Red5d

#! /bin/bash

echo "Installing basic security..."
apt-get -y install ufw rkhunter fail2ban
ufw allow 22
ufw allow 80
ufw allow 443
ufw enable

Red5d

#! /bin/bash

# This script helps set up GeoIP-based access restriction.

# Commands adapted from http://blog.grimneko.de/?p=228

echo "Installing libgeoip-dev, libpam0g-dev, and make (just in case it's not there)..."
sudo apt-get install libgeoip-dev libpam0g-dev make

echo

Red5d

#! /bin/bash

info=$(curl -s http://www.infosniper.net/?ip_address=$1 | grep content-td2 | cut -d'>' -f2 | cut -d'<' -f1 | sed 's/&nbsp;//g')

echo -n "Country: "
echo "$info" | sed -n '10p'

echo -n "State: "
echo "$info" | sed -n '6p'