Update README.md

Author: lisenet

README.md

@@ -2,12 +2,30 @@
 Various scripts to make AWS management easier.
 
 Developed and tested (mainly) on Debian Wheezy with Bash 4.2 and Python 2.7:
+```
+# apt-get install python2.7 python-pip
+# pip install awscli
+```
+```
+$ aws --version
+aws-cli/1.3.4 Python/2.7.3 Linux/3.2.0-4-amd64
+```
 
-<pre># apt-get install python2.7 python-pip
-# pip install awscli</pre>
+## backup-audit-aws
+Python script that connects to AWS, calculates a number of snaphosts availabe for each volume and sends a summary (a .csv file) via email. 
 
-<pre>$ aws --version
-aws-cli/1.3.4 Python/2.7.3 Linux/3.2.0-4-amd64</pre>
+The script can check multiple AWS accounts. You need to have AWS access and secret keys, plus your AWS account ID. Account ID is used by *get_all_snapshots* and *get_all_images*.
+
+SMTP server details are required if you want to send emails.
+
+The **_getFreeSnapshots_** function can be used to remove snapshots that have:
+* no AMI *and*
+* no existing volume.
+
+This function is not called by default. 
+
+### Usage
+`$ python ./backup-audit-aws.py`
 
 ## bulk-mod-of-aws-security-groups
 Bash script that opens a TCP/UDP/ICMP port on all AWS security groups. Script requires Python and aws cli.
@@ -19,4 +37,4 @@ Bash script that creates a new EC2 instance inside a VPC from an AMI. Script req
 Bash script that converts AWS IAM user's credentials to Amazon SES SMTP credentials. Script requires OpenSSL.
 
 ### Usage
-<pre>$ ./ses-smtp-conv.sh AWSAccessKeyID AWSSecretAccessKey</pre>
+`$ ./ses-smtp-conv.sh AWSAccessKeyID AWSSecretAccessKey`