How do I find what version of CKAN I am running

In later versions (testing 2.8.3) it is {{url}}/api/3/action/status_show

Older versions of CKAN had the version displayed on the footer of the page. Starting from CKAN 2.0, the version number is displayed in the source code with the following tag:

<meta name="generator" content="ckan 2.0.1" />

Or you can make this API call:

http://demo.ckan.org/api/util/status

{
ckan_version: "2.0.1",
site_url: "http://demo.ckan.org",
site_description: "Demo",
site_title: "CKAN Demo",
error_emails_to: "root",
locale_default: "en",
extensions: [
"stats",
"social",
"demo",
"datastore",
"datastorer",
"resource_proxy",
"recline_preview",
"json_preview",
"pdf_preview",
"repo_info",
"spatial_metadata",
"spatial_query",
"geojson_preview"
]
}