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TIL that in the docs there is a detailed explanation for how federation and search works in Lemmy
(join-lemmy.org)
Guide: One way you can take advantage of federation is by opening a different instance, like ds9.lemmy.ml, and browsing it. If you see an interesting community, post or user that you want to interact with, just copy its URL and paste it into the search of your own instance. Your instance will connect to the other one (assuming the allowlist/blocklist allows it), and directly display the remote content to you, so that you can follow a community or comment on a post. Here are some examples of working searches:
- [[email protected]](/c/[email protected]) (Community)
- @[email protected] (User)
- https://lemmy.ml/c/programming (Community)
- https://lemmy.ml/u/nutomic (User)
- https://lemmy.ml/post/123 (Post)
- https://lemmy.ml/comment/321 (Comment)
You can see the list of linked instances by following the "Instances" link at the bottom of any Lemmy page.
A person who posted/commented in the last 30 days
From the docs: "Lemmy also shows counts of active users for your site, and its communities. These are counted within the last day, week, month, and half year, and are cached on starting up lemmy, and every hour.
An active user is someone who has posted or commented on our instance or community within the last given time frame. For site counts, only local users are counted. For community counts, federated users are included."
https://join-lemmy.org/docs/contributors/07-ranking-algo.html