Yah if it was simple as that in Linux. When the page says do chown 775 xyz , the Linux throes error as can’t modify, then I go down rabbit hole…honestly it’s far from simple
To be able to use chown (Change Owner) you need to have the powers to do so. Your default user does not have such powers when the target is not yet owned by that user. Perhaps you did not use sudo, like sudo chown 775 xyz So I guess the documentation of that software installation howto is lacking specifics for Ubuntu (Ubuntu uses sudo, but e.g. Debian does not do so and defaults to su).