Run Command is an awesome feature of Systems Manager, which basically allows you to execute remote commands over your managed fleet of EC2 instances. You can perform a vast variety of automated administrative tasks, such as installing software or patching your operating systems, executing shell commands, managing local groups and users, and much more! But that's not all! The best part of using this feature is that it allows you to have a seamless experience when executing scripts, even over your on-premises Windows and Linux operating systems, whether they be running on VMware ESXi, Microsoft Hyper-V, or any other platforms. And the cost of all this? Well, it's absolutely free! You only pay for the EC2 instances and other AWS resources that you create and nothing more!
Here's a brief list of a few commonly predefined commands provided by Run Command along with a short description:
AWS-RunShellScript: Executes shell scripts on remote Linux instances