You are referring 5.6.1 docs. usehttp://host:port/communities.html

76% is the passing score

With Image Set users can see different views of an item by clicking a thumbnail image.Spin Set helps to simulates the real-world act of turning an object to examine it. simulates a 360-degree viewing experience.Mixed Media Sets combination of various experience like Spin Sets, imageset,  videos... b...

Deponds on your use case. Use groove or curl or etc....  The curl syntax would be [1] replace within anchor accordingly. Example to create a tag Test under default namespace is [2]...[1]    curl --data ":status=browser&_charset_=utf-8&cmd=createTag&jcr:description=<desc>&jcr:title=<title>&parentTagI...

Make use of typehint .https://sling.apache.org/documentation/bundles/manipulating-content-the-slingpostservlet-servlets-post.html#typehint

AFAIK there is no settings and you need to handle with custom implementation. Are you expecting major changes ? One thing come to solve would be Create a tool to find reference of pages using the component & then explicitly set changes in all those pages matching default value or use boiler template...

There are various ways like Using public keys without a passphrase  OR sshpass Or Expect . Check with your network team they will help with exact command.

Refer scp documentation. The parameter supplier is wrong that the after hostname you will have colon with path and there is no space.

Assuming you are asking for tree activation for details look [1]. Basically iterates through all the nodes, adopt to page & assets to get lastmodified date and also get replicationstatus.  [1]   /libs/cq/replication/components/treeactivation/POST.jsp

Switch to classic ui and verify.http://www.aemstuff.com/#article975