Suppose one day I woke up and decided "I'm gonna start a blog about Ubuntu" or "I'm gonna write a book about Ubuntu". Over time I've accumulated large amounts of answers, some of which could be combined into chapters/blog posts of their own. Now, I know the reuse of other people's answers has to come with attribution, and in fact a lot of my answers do rely on research from other sources. But what about my own answers? Can I republish them in another form? What are Stack Exchange policies on that?
- Material posted on Stack Exchange sites is owned by its author (you) and made available under the CC BY-SA Creative Commons license.
- As the owner of the material, you are free to do anything you want with it elsewhere. You do not have to provide attribution to yourself or mention SE or the CC license when you republish this material. You are the licensor, and you own the Copyright. Licenses like CC and Copyleft which aim to make material more shareable and provide more rights to users all depend to some extent on the rights of the owner as established in Copyright law for their enforceability.
Note however that you cannot revoke the CC BY-SA license you have granted to Stack Exchange. That is, you cannot remove the material you have posted here under a CC license in order to make it available exclusively elsewhere (I know that's not what you asked, but it may be of interest to readers).
Technically, this means that you don't have the right to delete your own content here (although you'll have noticed that the UI allows you to do so), only the right to have your identity disassociated from it.
To put this as simply as I can, your posts are your work so you have a right to distribute their content. The license you have eternally granted to SE to use that content doesn't affect that right (but it gives many rights to others to use your work which they would not otherwise have).
Another point worth noting is that significant additions to a post by editors would, I believe, technically require attribution.
For more details see, for example
Yes. Content you create is yours.
There was briefly a clause in the Terms and Conditions that —by my reading— had the inadvertent impact of demanding attribution. I also occasionally write technical blog posts so I shared your concern. I pointed this out and the offending clause was promptly fixed.
So again, things you create and submit here remain yours. You can reuse them wherever you like without attribution or restriction.
However, the "you create" aspect is important. Posts get edited, sometimes extensively. If it contains substantive edits from other people (copyright law isn't black and white, I can't define substantive), there is an argument that the end result is not entirely yours. Even if it's heavily edited, you could use it under the CC-BY-SA license (see footer link), or use an earlier revision that was substantively yours.
And while it's not the focus of your question, it came up in the comments of Zanna's excellent answer but SE and its sites have an enduring license to use the content you submit. They don't own it, they just have a license, but it's irrevocable. This comes up when people rage-quit and try to take all their answers with them. We moderators tend to stop and undo that. Obviously this makes those people super-happy but we're really just exercising our rights to the content in the interest of the sites.