Send remote commands - Instance| Alibaba Cloud Documentation Center

You can send remote commands to perform O&M operations on one or more instances without logging on to the instances.

Prerequisites

The instances that are used to receive commands are in the Running state.
The Cloud Assistant client is started on the instances. For more information, see Start or stop the Cloud Assistant client.

Background information

You must use Cloud Assistant to send and run remote commands, and the remote commands consume the quota of Cloud Assistant commands. For more information about Cloud Assistant and its limits, see Overview.

Procedure

Log on to the ECS console.
In the left-side navigation pane, choose Instances & Images > Instances.
In the top navigation bar, select a region.
Select one of the following methods to send a remote command:
- To send a remote command to a single instance, find the instance on the Instances page and click its ID to go to the instance details page. Click the Remote Commands tab and then click Send Command.
- To send a remote command to multiple instances, select the instances on the Instances page. In the lower part of the page, choose More > Send Command.
In the dialog box that appears, perform the following operations.

Note If some instances run Linux and others run Windows, you must configure the instances based on their operating systems when you perform batch operations on multiple instances.
1. Select a command type.
  - Linux instances: Shell is selected by default.
  - Windows instances: Select Bat or PowerShell.
2. Specify whether to retain commands.
  
  Note You can view the retained commands on the Cloud Assistant page and run these commands repeatedly. For more information about how to use Cloud Assistant to run remote commands on ECS instances, see Run a command.
3. In the Command Content code editor, enter a command.
  Note
  
  The command must be able to return the results of a single execution. Interactions with returned information are not allowed.
  
  For more information about shell commands, see View instance configurations.
4. Click Run.
  - You can click Stop to cancel the execution of a command.
  - After the execution is complete, you can view the command output in the Command Output section.
    To view the command output and execution results of each instance, click the instance ID.
  Note After an execution is complete, you can enter another command in the Command Content code editor to run the command.