EC2 Instance Information

ec2-describe-instances

RESERVATION     r-1a053371      558556443206    webserver
INSTANCE        i-d77524bd      ami-1234de7b    ec2-174-129-147-80.compute-1.amazonaws.com
domU-12-31-39-0A-91-41.compute-1.internal       running webserver       0
m1.small        2010-09-07T17:41:40+0000        us-east-1c      aki-5037dd39
monitoring-enabled      174.129.147.80  10.211.146.175                  ebs
BLOCKDEVICE     /dev/sda1       vol-b0633bd9    2010-09-07T17:41:58.000Z

ec2-get-console-output instance_id

Find EC2 Instance Private IP

ifconfig eth0

curl http://169.254.169.254/latest/meta-data/local-ipv4

Find EC2 Instance Public IP

curl http://169.254.169.254/latest/meta-data/public-ipv4

Retrieve EC2 Instance Meta-data

Find the available version of meta-data

curl http://169.254.169.254/
1.0
2007-01-19
2007-03-01
2007-08-29
2007-10-10
2007-12-15
2008-02-01
2008-09-01
2009-04-04

Retrieve available meta-data

curl http://169.254.169.254/2009-04-04/meta-data/
ami-id
ami-launch-index
ami-manifest-path
block-device-mapping/
hostname
instance-action
instance-id
instance-type
kernel-id
local-hostname
local-ipv4
placement/
public-hostname
public-ipv4
public-keys/
reservation-id

Retieve meta-data

curl http://169.254.169.254/2009-04-04/meta-data/public-hostname

Retrieve an item from a list

curl http://169.254.169.254/2009-04-04/meta-data/public-keys/0/openssh-key

Lock an EC2 Instance

Lock an instance will disable the AWS Management Console from terminating an instance

ec2-modify-instance-attribute instance_id --disable-api-termination true

To unlock

ec2-modify-instance-attribute instance_id --disable-api-termination false

Troubleshoot why EC2 Instant is terminated

ec2-describe-instances instance_id -v

Change EC2 Instance Attribute

Stop an instance

Change the attribute

ec2-modify-instance-attribute instance_id --instance-type instance_type
ec2-modify-instance-attribute instance_id --user-data user_data

EC2 Operation