amalc

  # Converts row / column references to letter based column row references
  # for spreadsheet addressing. Assumes 0 base.
  def convert_row_column_to_cell_reference(r, c, ref)
    throw :column_reference_too_large if c > 255
    if c / 26 == 0
      ref << (c%26+65).chr+(r+1).to_s
    else
      ref << (c/26+64).chr
      convert_row_column_to_cell_reference(r, c%26, ref)
    end

amalc

#Deploy and rollback on Heroku in staging and production
task :deploy_staging => ['deploy:set_staging_app', 'deploy:push', 'deploy:restart', 'deploy:tag']
task :deploy_production => ['deploy:set_production_app', 'deploy:push', 'deploy:restart', 'deploy:tag']

namespace :deploy do
  PRODUCTION_APP = 'YOUR_PRODUCTION_APP_NAME_ON_HEROKU'
  STAGING_APP = 'YOUR_STAGING_APP_NAME_ON_HEROKU'

  task :staging_migrations => [:set_staging_app, :push, :off, :migrate, :restart, :on, :tag]
  task :staging_rollback => [:set_staging_app, :off, :push_previous, :restart, :on]

amalc

class Lisp
  def initialize
    @env = { 
      :label => lambda { |(name,val), _| @env[name] = val },
      :quote => lambda { |sexpr, _| sexpr[0] },
      :car   => lambda { |(list), _| list[0] },
      :cdr   => lambda { |(list), _| list.drop 1 },
      :cons  => lambda { |(e,cell), _| [e] + cell },
      :eq    => lambda { |(l,r), _| l == r },
      :if    => lambda { |(cond, thn, els), ctx| eval(cond, ctx) ? eval(thn, ctx) : eval(els, ctx) },

amalc

// 17 standard colors are: aqua, black, blue, fuchsia, gray, grey, green, lime, maroon, navy, olive, purple, red, silver, teal, white, and yellow
$alice-blue:            #F0F8FF
$antique-white:         #FAEBD7
$aqua:                  #00FFFF
$aquamarine:            #7FFFD4
$azure:                 #F0FFFF
$beige:                 #F5F5DC
$bisque:                #FFE4C4
$black:                 #000000
$blanched-almond:       #FFEBCD

amalc

sudo iptables -F
sudo iptables -I INPUT 1 -i lo -j ACCEPT
sudo iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
sudo iptables -A INPUT -p tcp --dport ssh -j ACCEPT
sudo iptables -A INPUT -j DROP

amalc

yum install gcc make rpm-build autoconf.noarch zlib-devel pam-devel openssl-devel -y
wget http://openvpn.net/release/lzo-1.08-4.rf.src.rpm

# One of the commented ones below for 32 bit or 64 bit. Defaulting to 64 bit. Use uname -a to figure out what you are running.
# wget http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.2-1.el6.rf.i686.rpm
wget http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm

rpmbuild --rebuild lzo-1.08-4.rf.src.rpm
sudo adduser dag
rpm -Uvh lzo-*.rpm

amalc

service openvpn start

# Now we need to enable IP forwarding. So open the file /etc/sysctl.conf and set ‘net.ipv4.ip_forward’ to 1.
net.ipv4.ip_forward = 1

# To make the changes to sysctl.conf take effect, use the following command.
sysctl -p

# Route Iptables:
# The rule below will work fine on xen and KVM based VPS’s but for OpenVZ use the OpenVZ iptable rule instead:

amalc

sudo iptables -F
sudo iptables -I INPUT -i lo -j ACCEPT
sudo iptables -I INPUT -i tun0 -j ACCEPT
sudo iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
sudo iptables -A OUTPUT -o eth0 -p tcp --dport 1194 -m state --state ESTABLISHED -j ACCEPT
sudo iptables -A INPUT -i eth0 -p tcp --dport ssh -m state --state NEW,ESTABLISHED -j ACCEPT
sudo iptables -A OUTPUT -o eth0 -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT
sudo iptables -A INPUT -j DROP
sudo iptables -A OUTPUT -j DROP
sudo iptables -A FORWARD -j DROP

amalc

sudo iptables -F
sudo iptables -I INPUT -i lo -j ACCEPT
sudo iptables -I INPUT -i tun0 -j ACCEPT
sudo iptables -A INPUT -i eth0 -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT
sudo iptables -A OUTPUT -o eth0 -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT
sudo iptables -A INPUT -i eth0 -p tcp --dport 443 -m state --state NEW,ESTABLISHED -j ACCEPT
sudo iptables -A OUTPUT -o eth0 -p tcp --sport 443 -m state --state ESTABLISHED -j ACCEPT
sudo iptables -A INPUT -i eth0 -p tcp --dport ssh -m state --state NEW,ESTABLISHED -j ACCEPT
sudo iptables -A OUTPUT -o eth0 -p tcp --sport ssh -m state --state ESTABLISHED -j ACCEPT
sudo iptables -A INPUT -j DROP

amalc

sudo iptables -F
sudo iptables -A INPUT -p tcp -m state --state ESTABLISHED,RELATED -j ACCEPT
sudo iptables -A INPUT -p udp -m state --state ESTABLISHED,RELATED -j ACCEPT
sudo iptables -I INPUT -i lo -j ACCEPT
sudo iptables -I INPUT -i tun0 -j ACCEPT
sudo iptables -A OUTPUT -o eth0 -p tcp --dport 1194 -m state --state ESTABLISHED -j ACCEPT
sudo iptables -A INPUT -i eth0 -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT
sudo iptables -A OUTPUT -o eth0 -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT
sudo iptables -A INPUT -i eth0 -p tcp --dport 443 -m state --state NEW,ESTABLISHED -j ACCEPT
sudo iptables -A OUTPUT -o eth0 -p tcp --sport 443 -m state --state ESTABLISHED -j ACCEPT