I'm using Ubuntu Server 14.04.2 LTS and hosting wordpress on it. I installed it from the packages via apt-get.
Now wordpress complains almost every day about available updates per mail and that an auto-update has failed. Trying to update it from the wordpress dashboard fails as well.
So my general question is: what is the best practice on updating wordpress on ubuntu?
Going with the ubuntu packages only. If there are any security problems with the ubuntu version, will it be fixed automatically via the daily security updates? If so, how one can disable the nagging update emails?
Going with the wordpress updates directly. Besides making that work within ubuntu, is that recommended? What happens, if I performed updates via wordpress directly, but now comes and update from the package manager? Will it probably downgrade my wordpress? Will it maybe break the updated package?
Going with a "native" wordpress installation. Forgetting about the ubuntu wordpress packages at all and install wordpress via tar.gz or whatever.
To be clear: I'm not after the latest wordpress features and fancy plugins, but after a stable, security-managed version.