Amazon Elastic Compute Cloud
CLI Reference (API Version 2011-12-15)
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ec2-reboot-instances

Description

Requests a reboot of one or more instances. This operation is asynchronous; it only queues a request to reboot the specified instance(s). The operation will succeed if the instances are valid and belong to you. Requests to reboot terminated instances are ignored.

[Note]Note

If a Linux/UNIX instance does not cleanly shut down within four minutes, Amazon EC2 will perform a hard reboot.

The short version of this command is ec2reboot.

Syntax

ec2-reboot-instances instance_id [instance_id ...]

Options

NameDescriptionRequired

instance_id

One or more instance IDs of instances to be rebooted.

Type: String

Default: None

Example: i-3ea74257

Yes

Common Options

OptionDescription

--region REGION

Overrides the Region specified in the EC2_URL environment variable and the URL specified by the -U option.

Default: The EC2_URL environment variable, or us-east-1 if the environment variable is not set.

Example: --region eu-west-1

-U, --url URL

URL is the uniform resource locator of the Amazon EC2 web service entry point.

Default: The EC2_URL environment variable, or https://ec2.amazonaws.com if the environment variable is not set.

Example: -U https://ec2.amazonaws.com

-K, --private-key EC2-PRIVATE-KEY

The private key to use when constructing requests to Amazon EC2.

Default: The value of the EC2_PRIVATE_KEY environment variable.

Example: -K pk-HKZYKTAIG2ECMXYIBH3HXV4ZBZQ55CLO.pem

-C, --cert EC2-CERT

The X.509 certificate to use when constructing requests to Amazon EC2.

Default: The value of the EC2_CERT environment variable.

Example: -C cert-HKZYKTAIG2ECMXYIBH3HXV4ZBZQ55CLO.pem

--connection-timeout TIMEOUT

Specifies a connection timeout (in seconds).

Example: --connection-timeout 30

--request-timeout TIMEOUT

Specifies a request timeout (in seconds).

Example: --request-timeout 45

-v, --verbose

Displays verbose output by showing the SOAP request and response on the command line. This is particularly useful if you are building tools to talk directly to our SOAP API.

-H, --headers

Displays column headers in the output.

--show-empty-fields

Shows empty columns as (nil).

--hide-tags

Do not display tags for tagged resources.

--debug

Prints internal debugging information. This is useful to assist us when troubleshooting problems.

-?, --help, -h

Displays Help.

-

If - is specified as an argument to one of the parameters, a list of arguments is read from standard input. This is useful for piping the output of one command into the input of another.

Example: ec2-describe-instances | grep stopped | cut -f 2 | ec2-start-instances -

Output

The command returns a table that contains the following information:

  • This command displays no output on success

Amazon EC2 command line tools display errors on stderr.

Examples

Example Request

This example reboots an instance.

PROMPT> ec2-reboot-instances i-28a64341