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Elastic Compute Service:Reset the logon password of an instance

Last Updated:Jul 13, 2023

If you did not set a logon password when you created an Elastic Compute Service (ECS) instance or if you forget the logon password of an ECS instance, you can use the password reset feature to change the password or set a logon password for the instance. This topic describes how to reset the logon password of an instance in the ECS console.

Prerequisites

The instance whose logon password you want to reset is in the Running or Stopped state.

Methods

This topic focuses on how to reset the logon password of an instance in the ECS console. You can also use Cloud Assistant to reset the logon password of an instance, or connect to an instance and reset the logon password in the instance. The following table compares the different methods that can be used to reset the logon password of an instance.

Method

Impact

References

Reset the logon password of an instance in the ECS console

  • The instance must be in the Running or Stopped state.

  • You do not need to log on to the instance.

  • After you reset the password, you must start or restart the instance for the new password to take effect.

    Warning The restart operation stops the instance for a short period of time and may interrupt services that are running on the instance. We recommend that you restart instances during off-peak hours.

Procedure section of this topic

Reset the logon password of an instance by using Cloud Assistant

  • The instance must be in the Running state.

  • You do not need to log on to the instance.

  • After you reset the password, you do not need to restart the instance for the new password to take effect.

Change the logon password of an instance

Connect to an instance and reset its logon password in the instance

  • The instance must be in the Running state.

  • You must connect to the instance. The procedure to connect to an instance is complex.

  • After you reset the password, you do not need to restart the instance for the new password to take effect.

Change the logon password of an instance by connecting to the instance

Considerations

When you reset the logon password of an instance in the ECS console, take note of the following items:

  • Select an appropriate period of time to reset the password. If the instance is in the Running state, you must restart the instance after the password is reset for the new password to take effect.

    Warning The restart operation stops the instance for a short period of time and may interrupt services that are running on the instance. We recommend that you restart instances during off-peak hours.
  • The key pair authentication method overrides the username-password authentication method. Linux instances can be logged on to by using key pairs or by using usernames and passwords. If you bind a key pair to a Linux instance that already has a logon password, the password becomes invalid and you can only use the key pair to log on to the instance. If you want to use a password to log on to the Linux instance, you must reset the logon password.

Procedure

  1. Log on to the ECS console.
  2. In the left-side navigation pane, choose Instances & Images > Instances.
  3. In the top navigation bar, select a region.
  4. Perform one of the following operations based on the number of instances whose logon passwords you want to reset at a time:

    • To reset the logon password of a single instance, find the instance and choose More > Password/Key Pair > Reset Password in the Actions column.

      单个重置实例
    • To reset the password of multiple instances at a time, select the instances and click Reset Instance Password below the instance list.

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  5. In the Reset Instance Password dialog box, enter and confirm a new password and then click Save Password.

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    Decide whether to start or restart the instance for the new password to take effect based on the status of the instance.

    • If the instance is in the Running state, click Restart Now.

    • If the instance is in the Stopped state, the new password takes effect when you start the instance.