Start or stop the Cloud Assistant client - Deployment & Maintenance| Alibaba Cloud Documentation Center

Stop or start the client on a Windows instance

To start or stop the Cloud Assistant client on a Windows instance, perform the following steps:

Connect to the Windows instance. For more information, see Connect to a Windows instance from a local client.
Choose Computer Management > Services and Applications > Services and find AliyunService.

Warning AliyunService is the process of the Cloud Assistant client. If you stop AliyunService, the Cloud Assistant client also stops. This may result in an exception on the ECS instance and cause the instance failed to be stopped in the ECS console. Proceed with caution when you stop AliyunService.
Click Stop or Restart below AliyunService.

Uninstall the Cloud Assistant daemon process from a Linux instance

The Cloud Assistant daemon process is used to monitor the resource consumption of the Cloud Assistant client, report the running status of the client, and restart the client when the client fails. Before you stop the Cloud Assistant client, you must uninstall the Cloud Assistant daemon process first.

Note The Cloud Assistant daemon process is available only for Linux instances.

Connect to the Linux instance. For more information, see Connect to a Linux instance by using a username and password.
Stop the Cloud Assistant daemon process.
```
/usr/local/share/assist-daemon/assist_daemon --stop
```
Note /usr/local/share/assist-daemon/assist_daemon is the default path of the Cloud Assistant daemon process.

Uninstall the Cloud Assistant daemon process.

/usr/local/share/assist-daemon/assist_daemon --delete

Delete the directory of the Cloud Assistant daemon process.
```
rm -rf /usr/local/share/assist-daemon
```

Stop or start the client on a Linux instance

Note Before you stop the Cloud Assistant client, you must uninstall the Cloud Assistant daemon process first. For more information, see the Uninstall the Cloud Assistant daemon process from a Linux instance section.

To start or stop the Cloud Assistant client on a Linux instance, perform the following steps:

Connect to the Linux instance. For more information, see Connect to a Linux instance by using a username and password.
Run the following commands based on the init system of the ECS instance:
- For Linux operating systems based on new versions of the Linux kernel, which typically use the systemd initialization process, perform the following steps:
  - Check whether your ECS instance uses the systemd initialization process. If a message is returned, systemd is used.
```
strings /sbin/init | grep "/lib/system"
```
  - Stop the Cloud Assistant client.
```
systemctl stop aliyun.service
```
  - Start the Cloud Assistant client.
```
systemctl start aliyun.service
```
- For Ubuntu 14 or earlier operating systems, which typically use the UpStart initialization process, perform the following steps:
  - Check whether your ECS instance uses the UpStart initialization process. If a message is returned, UpStart is used.
```
strings /sbin/init | grep "upstart"
```
  - Stop the Cloud Assistant client.
```
/sbin/initctl stop aliyun-service
```
  - Start the Cloud Assistant client.
```
/sbin/initctl start aliyun-service
```
- For Linux operating systems based on earlier versions of the Linux kernel, which typically use the sysvinit initialization process, perform the following steps:
  - Check whether your ECS instance uses the sysvinit initialization process. If a message is returned, sysvinit is used.
```
strings /sbin/init | grep "sysvinit"
```
  - Stop the Cloud Assistant client.
```
/etc/init.d/aliyun-service stop
```
  - Start the Cloud Assistant client.
```
/etc/init.d/aliyun-service start
```