# Use `EnterStandby` with a CLI
<a name="example_auto-scaling_EnterStandby_section"></a>

The following code examples show how to use `EnterStandby`.

------
#### [ CLI ]

**AWS CLI**  
**To move instances into standby mode**  
This example puts the specified instance into standby mode. This is useful for updating or troubleshooting an instance that is currently in service.  

```
aws autoscaling enter-standby \
    --instance-ids i-061c63c5eb45f0416 \
    --auto-scaling-group-name my-asg \
    --should-decrement-desired-capacity
```
Output:  

```
{
    "Activities": [
        {
            "ActivityId": "ffa056b4-6ed3-41ba-ae7c-249dfae6eba1",
            "AutoScalingGroupName": "my-asg",
            "Description": "Moving EC2 instance to Standby: i-061c63c5eb45f0416",
            "Cause": "At 2020-10-31T20:31:00Z instance i-061c63c5eb45f0416 was moved to standby in response to a user request, shrinking the capacity from 1 to 0.",
            "StartTime": "2020-10-31T20:31:00.949Z",
            "StatusCode": "InProgress",
            "Progress": 50,
            "Details": "{\"Subnet ID\":\"subnet-6194ea3b\",\"Availability Zone\":\"us-west-2c\"}"
        }
    ]
}
```
For more information, see [Amazon EC2 Auto Scaling instance lifecycle](https://docs.aws.amazon.com/autoscaling/ec2/userguide/detach-instance-asg.html) in the *Amazon EC2 Auto Scaling User Guide*.  
+  For API details, see [EnterStandby](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/autoscaling/enter-standby.html) in *AWS CLI Command Reference*. 

------
#### [ PowerShell ]

**Tools for PowerShell V4**  
**Example 1: This example puts the specified instance into standby mode and decreases the desired capacity so that Auto Scaling does not launch a replacement instance.**  

```
Enter-ASStandby -InstanceId i-93633f9b -AutoScalingGroupName my-asg -ShouldDecrementDesiredCapacity $true
```
**Output:**  

```
ActivityId           : e36a5a54-ced6-4df8-bd19-708e2a59a649
AutoScalingGroupName : my-asg
Cause                : At 2015-11-22T15:48:06Z instance i-95b8484f was moved to standby in response to a user request,
                       shrinking the capacity from 2 to 1.
Description          : Moving EC2 instance to Standby: i-95b8484f
Details              : {"Availability Zone":"us-west-2b","Subnet ID":"subnet-5264e837"}
EndTime              : 
Progress             : 50
StartTime            : 11/22/2015 7:48:06 AM
StatusCode           : InProgress
StatusMessage        :
```
**Example 2: This example puts the specified instance into standby mode without decreasing the desired capacity. Auto Scaling launches a replacement instance.**  

```
Enter-ASStandby -InstanceId i-93633f9b -AutoScalingGroupName my-asg -ShouldDecrementDesiredCapacity $false
```
**Output:**  

```
ActivityId           : e36a5a54-ced6-4df8-bd19-708e2a59a649
AutoScalingGroupName : my-asg
Cause                : At 2015-11-22T15:48:06Z instance i-95b8484f was moved to standby in response to a user request.
Description          : Moving EC2 instance to Standby: i-95b8484f
Details              : {"Availability Zone":"us-west-2b","Subnet ID":"subnet-5264e837"}
EndTime              : 
Progress             : 50
StartTime            : 11/22/2015 7:48:06 AM
StatusCode           : InProgress
StatusMessage        :
```
+  For API details, see [EnterStandby](https://docs.aws.amazon.com/powershell/v4/reference) in *AWS Tools for PowerShell Cmdlet Reference (V4)*. 

**Tools for PowerShell V5**  
**Example 1: This example puts the specified instance into standby mode and decreases the desired capacity so that Auto Scaling does not launch a replacement instance.**  

```
Enter-ASStandby -InstanceId i-93633f9b -AutoScalingGroupName my-asg -ShouldDecrementDesiredCapacity $true
```
**Output:**  

```
ActivityId           : e36a5a54-ced6-4df8-bd19-708e2a59a649
AutoScalingGroupName : my-asg
Cause                : At 2015-11-22T15:48:06Z instance i-95b8484f was moved to standby in response to a user request,
                       shrinking the capacity from 2 to 1.
Description          : Moving EC2 instance to Standby: i-95b8484f
Details              : {"Availability Zone":"us-west-2b","Subnet ID":"subnet-5264e837"}
EndTime              : 
Progress             : 50
StartTime            : 11/22/2015 7:48:06 AM
StatusCode           : InProgress
StatusMessage        :
```
**Example 2: This example puts the specified instance into standby mode without decreasing the desired capacity. Auto Scaling launches a replacement instance.**  

```
Enter-ASStandby -InstanceId i-93633f9b -AutoScalingGroupName my-asg -ShouldDecrementDesiredCapacity $false
```
**Output:**  

```
ActivityId           : e36a5a54-ced6-4df8-bd19-708e2a59a649
AutoScalingGroupName : my-asg
Cause                : At 2015-11-22T15:48:06Z instance i-95b8484f was moved to standby in response to a user request.
Description          : Moving EC2 instance to Standby: i-95b8484f
Details              : {"Availability Zone":"us-west-2b","Subnet ID":"subnet-5264e837"}
EndTime              : 
Progress             : 50
StartTime            : 11/22/2015 7:48:06 AM
StatusCode           : InProgress
StatusMessage        :
```
+  For API details, see [EnterStandby](https://docs.aws.amazon.com/powershell/v5/reference) in *AWS Tools for PowerShell Cmdlet Reference (V5)*. 

------

For a complete list of AWS SDK developer guides and code examples, see [Using this service with an AWS SDK](sdk-general-information-section.md). This topic also includes information about getting started and details about previous SDK versions.