CentOS 7, Annoyances In The Logs

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1. I’m seeing a lot of noise in the logfile for a workstation that I just built a couple months ago. One complaint is that Configuration file /usr/lib/systemd/system/ebtables.service is marked executable. Please remove executable permission bits. Proceeding anyway.

*Should* anything named .service have any permissions other than readable (and write for root)?

2. A lot of python: SELinux is preventing /usr/sbin/NetworkManager from write access on the directory /sys.#012#012***** Plugin catchall (100. confidence)
suggests **************************#012#012If you believe that NetworkManager should be allowed write access on the sys directory by default.#012Then you should report this as a bug.#012You can generate a local policy module to allow this access.#012Do#012allow this access for now by executing:#012# grep NetworkManager /var/log/audit/audit.log |
audit2allow -M mypol#012# semodule -i mypol.pp#012

Which policy I implemented, but why is that incorrect in the first place?

3. Finally, the noisiest of all, NetworkManager[7723]: error requesting auth for org.freedesktop.NetworkManager.settings.modify.hostname: (0)
Authorization check failed:
GDBus.Error:org.freedesktop.DBus.Error.NoReply: Message did not receive a reply (timeout by message bus)

and for what seems like every possible network type NetworkMangler handles, including wifi, and I yum removed NetwoworkManager-wifi….

Anyone have any answers so I can shut this up?