To get your current docker version you can run the following command
root@computer:~# docker version Client: Version: 17.07.0-ce-rc3 API version: 1.31 Go version: go1.8.3 Git commit: 665d244 Built: Thu Aug 17 00:58:39 2017 OS/Arch: linux/amd64 Server: Version: 17.07.0-ce-rc3 API version: 1.31 (minimum version 1.12) Go version: go1.8.3 Git commit: 665d244 Built: Thu Aug 17 00:57:31 2017 OS/Arch: linux/amd64 Experimental: false