ec2meta man page
ec2meta — get the metadata for this particular ec2 instance
ec2meta -h --help [type]
With a TYPE reports just that TYPE of meta data. With out one reports on all meta data available. (except the keys, which are listed by name, not value)
The -h flag displays this help message.
ami_id The AMI ID used to launch the instance. 1.0 ami_manifest_path The manifest path of the AMI with which the instance was launched. 1.0 ami_launch_index The index of this instance in the reservation (per AMI). 1.0 ancestor_ami_ids The AMI IDs of any instances that were rebundled to create this AMI. 2007_10_10 instance_id The ID of this instance. 1.0 instance_type The type of instance to launch. For more information, see Selecting Instance Types. 2007_08_29 local_hostname The local hostname of the instance. 2007_01_19 public_hostname The public hostname of the instance. 2007_01_19 local_ipv4 Public IP address if launched with direct addressing; private IP address if launched with public addressing. 1.0 public_ipv4 NATted public IP Address 2007_01_19 public_keys/ Public keys. Only available if supplied at instance launch time 1.0 reservation_id ID of the reservation. 1.0 security_groups Names of the security groups the instance is launched in. Only available if supplied at instance launch time 1.0 product_codes Product codes associated with this instance. 2007_03_01 user_data User supplied data at instance launch