sudo -u postgres psql

sudo fuser -k 80/tcp

http://backlinko.com/white-hat-seo

http://www.clambr.com/link-building-tools/

http://www.randombyte.com/101-white-hat-seo-tips/

http://www.pushon.co.uk/articles/top-5-white-hat-and-black-hat-search-optimisation-techniques/

http://backlinko.com/

http://tomdoc.org/

http://warpspire.com/kss/

https://github.com/styleguide/css

https://github.com/kneath/kss

https://stripe.com/blog/send-payouts-with-stripe

http://www.quora.com/Balanced/How-does-Balanced-compare-against-Stripe

http://www.jeffmould.com/2014/02/16/comparing-stripe-vs-braintree-vs-balanced-vs-dwolla/

http://sixrevisions.com/tools/online-payment-systems/

http://blog.localon.com/2013/11/21/why-we-switched-from-stripe-to-balanced/

http://www.getapp.com/compare/payment-management-software/stripe-vs-square

http://www.businessinsider.com/square-stripe-online-payments-2012-8

http://pando.com/2014/01/24/memo-to-stripe-winning-the-he...

drop index index_name on table_name

c = ActiveRecord::Base.connection
c.tables.collect do |t|  
  columns = c.columns(t).collect(&:name).select {|x| x.ends_with?("_id" || x.ends_with("_type"))}
  indexed_columns = c.indexes(t).collect(&:columns).flatten.uniq
  unindexed = columns - indexed_columns
  unless unindexed.empty?
    puts "#{t}: #{unindexed.join(", ")}"
  end
end

 $ git checkout --track origin/serverfix

pdftk

qpdf --decrypt --password=PASSWORD INPUT_FILE.pdf OUTPUT_FILE.pdf

https://aws.amazon.com/cli/

find . -mtime +512  | wc -l

find . -mtime +512 -exec aws s3 cp {} s3://bucket_location \;

\q;

In /etc/passwd you'll see a primary group assigned to each user like this:

Code:
john:x:1001:1001:John:/home/john:/bin/bash

User "john" here has uid 1001 and his primary group is also 1001. When john creates files, they will be owned by john and assigned to group 1001.

john can also belong to other ("secondary") groups. These assignments are made in /etc/group:

Code:
someusers:x:500:john,jill,jack,harry

Here john, jill, jack, and harry also belong to the group called "someusers" with gid 500. So john will also have the privileg...

1. Create the user

   $ adduser user_name

2. Give root privileges

   $ visudo

Add user to privileges

user_name ALL=(ALL:ALL) ALL