Cannot shut down or restart Linux instances

A Linux instance consistently fails to reboot or shut down when "Restart" or "Shut down" is selected in the ThinkAgile CP Management Portal, but "Force restart" and "Force shut down" succeed.

Shutdown and restart commands send an ACPI signal to the instance, which can be ignored if the ACPI daemon is not installed or not configured properly on the instance.

This issue is resolved by installing the ACPU daemon on the specific instance.

To install the ACPI daemon on an instance, follow these steps:

1. Log into the instance.
2. Execute the following commands, depending on the operating system:
   1. For CentOS:

      yum install acpidchkconfig acpid onservice acpid start

   2. For Ubuntu:

      sudo aptitude install acpid