If Kong is running on docker, refer to Kong - Docker container command line for the steps on how to issue commands in the Kong Docker container.
Use the ps command to determine if Kong is running. If there are Kong processes, like this, Kong is running.
ps -ef | grep -i kong . . . 1 kong 0:00 nginx: master process /usr/local/openresty/nginx/sbin/nginx -p /usr/local/kong -c nginx.conf 22 kong 48:05 nginx: worker process 23 kong 2:12 nginx: worker process 24 kong 2:06 nginx: worker process 25 kong 14:27 nginx: worker process 50 kong 0:00 sh 66 kong 0:00 ps -ef 67 kong 0:00 grep -i kong
Use the kong version command to return the version of Kong. In this example, the version of Kong is 2.0.1.
kong version . . . 2.0.1
If you have more than one version of Kong installed, use the -c option following by the path to the kong.conf file.
kong version -c /path/to/kong.conf . . . 2.0.1