there's no other way to update the anchor other than running as root
?
i believe unbound-anchor rename()'s the replacement file onto the
existing file, so you will also need permission to write into the
containing directory.
The last command is just an automatic edit of the config file to change
the value of `auto-trust-anchor-file` without having to start a
text-editor, so that you can copy/paste. It assumes the option is
already uncommented (enabled).