snap install amazon-ssm-agent

snap install amazon-ssm-agent --classic
amazon-ssm-agent 3.0.1124.0 from Amazon Web Services (aws✓) installed

snap install amazon-ssm-agent
error: This revision of snap "amazon-ssm-agent" was published using classic confinement and thus
       may perform arbitrary system changes outside of the security sandbox that snaps are usually
       confined to, which may put your system at risk. 

       If you understand and want to proceed repeat the command including --classic.

See also

• AWS Systems Manager (ASM): session-manager-plugin, aws ssm [ get-inventory | aws ssm parameter, amazon-ssm-agent | describe-instance-information | start-session | terminate-session | resume-session | send-command | get-parameter | put-parameter | aws ssm list-instance-profiles | list-command-invocations ]
• AWS Systems Manager: CloudWatch Dashboard, Incident Manager, Change Manager, amazon-ssm-agent, ssm-cli, OpsItems, Session Manager, Parameter Store