You can upgrade system by commands when you connect to it.
Linux OS update, you only need to run an update command to install most updates
#CentOS or Redhat
sudo yum update -y
#Ubuntu
apt update && apt upgrade -yIn fact, the image provided by Websoft9 has periodically executed the above update commands through cron of Linux.
The update of the Windows server is similar to that of the local computer. Manually find the update management program and set the automatic download automatic update.