amalc’s gists

amalc / openvpn-forwarding.sh

Created December 19, 2012 00:30

Setting up forwarding on client for OpenVPN for client to reach each other on CentOS 6.xx

	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 / gist:4332396

Created December 18, 2012 21:53

Setting up openvpn via a repo on CentOS 6.xx

	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 / firewall-ssh.sh

Created December 18, 2012 18:28

iptables - only ssh.

	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 / _html_colors.css.sass

Created February 12, 2012 13:50

HTML colors in SASS format

	// 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 / lithp.rb

Created January 26, 2012 14:47 — forked from fogus/lithp.rb

	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 / deploy.rake

Created June 26, 2011 02:36 — forked from njvitto/deploy.rake

Rakefile to deploy and rollback to Heroku in two different environments (staging and production) for the same app

	#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 / gist:143790

Created July 9, 2009 16:38

Converting R1C1 style references for spreadsheets to AA1 style

	# 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

	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) },