docker version

~ $ ssh ip-10-33-24-121.ec2.internal -l core
Last login: Wed May 30 12:16:45 UTC 2018 from 10.32.0.6 on pts/0
Container Linux by CoreOS stable (1745.4.0)
core@ip-10-33-24-121 ~ $ docker version
Client:
 Version:      18.03.1-ce
 API version:  1.37
 Go version:   go1.9.4
 Git commit:   9ee9f40
 Built:        Thu Apr 26 04:27:49 2018
 OS/Arch:      linux/amd64
 Experimental: false
 Orchestrator: swarm

Server:
 Engine:
  Version:      18.03.1-ce
  API version:  1.37 (minimum version 1.12)
  Go version:   go1.9.4
  Git commit:   9ee9f40
  Built:        Thu Apr 26 04:27:49 2018
  OS/Arch:      linux/amd64
  Experimental: false
core@ip-10-33-24-121 ~ $