OpenRC 0.28 will mount efivars read only by default due to concerns about users bricking systems by writing to this filesystem unexpectedly.
Here is the newsitem covering this change. William
Title: Mounting efivars read only Author: William Hubbs <willi...@gentoo.org> Content-Type: text/plain Posted: 2017-07-15 Revision: 1 News-Item-Format: 1.0 Display-If-Installed: <=sys-apps/openrc-0.28 OpenRC 0.28 mounts efivars read only due to concerns about changes in this file system making systems unbootable. If you need to change something in this path, you will need to re-mount it read-write, make the change and re-mount it read-only. Also, you can override this behavior by adding a line for efivars to fstab if you want efivars mounted read-write. For more information on this issue, see the following url: https://github.com/openrc/openrc/issues/134
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