$ grep -l "#aws" ~/blog/*

total 6

1. 2014-02-08 Migrating from WordPress to Octopress on Amazon S3 #aws #octopress #wordpress
2. 2013-04-04 Getting a Domain Name with VALUE DOMAIN #aws
3. 2013-03-27 Assigning a Static IP with EC2 Elastic IP #aws
4. 2013-03-24 WordPress xml-rpc Error #aws #wordpress
5. 2013-03-24 Creating an EC2 Instance #aws