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Amazon EC2 enables users to share their AMIs with other users. This section describes how to share AMIs using the Amazon EC2 command line tools.
![[Note]](images/note.png) | Note |
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Before proceeding, make sure to read the security considerations of sharing AMIs in the Shared AMI Guidelines section. |
AMIs have a launchPermission property that controls which users,
besides the owner, are allowed to launch instances of that AMI. By modifying an
AMI's launchPermission property, you can allow all users to launch
the AMI (make the AMI public) or only allow a few specific users to launch the AMI.
The launchPermission attribute is a list of users and launch groups.
Launch permissions can be granted by adding or removing items from the list. Explicit
launch permissions for users are granted or revoked by adding or removing their AWS
account IDs. The only launch group currently supported is the all group,
which makes the AMI public. The rest of this section refers to launch groups simply as
groups. Launch groups are not the same as security groups and the two should not be
confused. An AMI can have both public and explicit launch permissions.
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You are not billed when your AMI is launched by other users. Users launching the AMI are billed. |
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