EC2 for Solutions Architects

a) EC2 instances are billed by the second, t2.micro is free tier

b) On Linux/Mac we use SSH, on Windows we use Putty

c) SSH is on port 22, lock down the security group to your IP

d) Timeout issues => Security groups issues

e) Permission issues on the SSH key => run "chmod 0400"

f) Security Groups can reference other Security Groups instead of IP ranges (very popular exam question)

g) Know the difference between Private, Public and Elastic IP

h) You can customize an EC2 instance at boot time using EC2 User Data

i) Know the 4 EC2 launch modes:

 - On demand

 - Reserved

 - Spot instances

 - Dedicated Hosts

j) Know the basic instance types: R,C,M,I,G,T2/T3

k) You can create AMIs to pre-install software on your EC2 => faster boot

l) AMI can be copied across regions and accounts

m) EC2 instances can be started in placement groups:

 - Cluster

 - Spread