Subreddits

r/sysadmin

Of course this is where everyone should be. Generell question regardings systems or when a global issue happens, there is the place where you know it first. Bigger Topics are discussed from a lot of people and everyone can give there perspective on things.

r/selfhosted

This is a good place where a lot of people are who are doing the exact same and where you can exchange your experience and ideas with the community. Also you can share your setup and inspire others on new products or ideas.

r/opensource

This is a place for opensource product discussion, new products and some developers are also answering questions there to there products. Sometimes show you new products before they are getting famous.