While creating amazon config file in a shell script, use cat with heredoc like this..

cat > myconfigfile.txt << "heredoc"
[default]
aws_access_key_id=XXX
aws_secret_access_key=XXX
region=us-east-1
heredoc

export AWS_CONFIG_FILE=./myconfigfile.txt

Amazon API gateway allows us to host serverless API's those can talk to cloud or on-premises databases. Here is 5 lines of python code to use the API

from urllib.request import Request, urlopen

url='https://xxx.execute-api.ap-south-1.amazonaws.com/stag'

q = Request(url)
q.add_header('uname', '472202986990')
data = urlopen(q).read().decode('UTF-8')

In the bad old days, the glacier class used to have different layers.

import boto.glacier.layer2
l2 = boto.glacier.layer2.Layer2(aws_access_key_id='xxx', aws_secret_access_key='xxx')

Now the client is all you need!

import boto3
gc = boto3.client("glacier",
aws_access_key_id="xxx", aws_secret_access_key="xxx",)

a) Method Execution - Get Method Request - URL Query String Parameters - add a variable: cmnumber

b) Method Execution - Get Integration Request - Mapping Templates - Content-Type - application/json - Mapping template

{"mnumber": "$input.params('cmnumber')"}

"requestTemplates": {
     "application/json": {
        "querystring": "$input.params().querystring"
      }
 }

Here are 5 commands to run docker on ARM processors:

sudo apt-get update
sudo apt-get upgrade
curl -fsSL get.docker.com -o get-docker.sh && sh get-docker.sh
sudo usermod -aG docker $USER
sudo docker run --rm -it -p 80:80 jasonrandrews/php-example

enable Weekly Email Notification from the Trusted Advisor.

1) Open the AWS Management Console.
2) Go to the Trusted Advisor service.
3) Select Preferences from the sub-navigation.
4) Enable weekly email notifications.

1. Open the AWS SNS Management Console
2. Create and select a SNS topic
3. Click on Actions > Subscribe to Topic

4. Choose HTTPS as the protocol and set the endpint to:
https://api.marbot.io/v1/sns/ea5e

5. Configure your CloudWatch Alarms to send notifications to the SNS topic.

lsblk prints all block devices in a tree-like format.

lsblk
NAME    MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvda    202:0    0   8G  0 disk
└─xvda1 202:1    0   8G  0 part /
xvdf    202:80   0  90G  0 disk

If file command on the disk identifier "xvdf" shows simply "data", then there is no file system on the device and you need to create one.

file -s /dev/xvdf
/dev/xvdf: data

List of important Types in Amazon Cloud Formation tool:

IAM (User, Group, Policy, AccessKey, Role)
Athena (NamedQuery)
Route53 (RecordSetGroup)
EC2 (SecurityGroup::Id, KeyPair::KeyName, SpotFleet)
Lambda (Function, Permission)
Events (Rule)
ApiGateway (RestApi, Method, Deployment)
Logs (LogGroup)

#### create bucket
aws s3 mb s3://johntest123/

#### rsync all files from a given folder to S3 bucket:
aws s3 sync /home/ec2-user/ s3://johntest123/

#### Remove bucket
aws s3 rb --force s3://johntest123/