sbfasad.blogg.se - Refind boot manager yosemite

Refind boot manager yosemite install#
Refind boot manager yosemite manual#
Refind boot manager yosemite upgrade#

If you wish to check the current status and log output of the running service you can do so by executing: systemctl status refind-btrfsĪlternatively, there exists a PyPI package but bear in mind that since libbtrfsutil isn't available on PyPI it needs to be already present in the system site packages (its Python bindings, to be precise) because it cannot be automatically pulled in as a dependency. If you are using Snapper along with its capability to take regular snapshots on boot this service should take these into account as well because it is set to start before Snapper's relevant service does so (the one named rvice).īefore running the script for the first time or enabling and starting the service make sure to at least check and perhaps modify the config file (/etc/nf) to suit your own needs. There is also a systemd service aptly named rvice which runs the tool in a background mode of operation where the described steps are performed automatically once a change (snapshot creation or deletion) happens in the watched snapshot directories which are the same ones as those in which it searches for snapshots. It comes with a script (refind-btrfs) which can be used to perform the described steps, on-demand (root privileges are required to run it).

Refind boot manager yosemite install#

This tool is currently available only in the AUR which means that Arch Linux users (as well as users of derivative distributions, I imagine) can easily install it. the "rootflags" option must define a "subvol" suboption which is matched with the root subvolume's logical path and/or a "subvolid" suboption which is matched with the root subvolume's ID.the "root" option must be matched with the root partition (by PARTUUID or PARTLABEL), its filesystem (by UUID or LABEL) or with a block device (by name) which itself represents the root partition.

Refind boot manager yosemite manual#

at least one manual boot stanza (found in rEFInd's main config file or in any of the additional config files included within it) defined such that (see the ArchWiki for an example) its own "options" field or any such field belonging to at least one of its sub-menus contains definitions of the following boot loader options:.

at least one snapshot of the root subvolume.

Btrfs formatted filesystem with a subvolume mounted as /.

mounted ESP (no automatic discovery and/or mounting is supported).

The following conditions (some are probably superfluous at this point) must be satisfied in order for this tool to function correctly: This behavior is configurable and enabled by default. This tool will also detect a situation where / is mounted as a snapshot (which means that you've already booted into one), issue a warning and simply exit whereas, for instance, Snapper will happily continue creating its snapshots, regardless.

Refind boot manager yosemite upgrade#

It goes without saying that the consequence of having this kind of a setup is being unable to mitigate a problematic kernel upgrade by simply booting into a snapshot. In case a separate /boot partition is detected only the fields relevant to / are modified ("subvol" and/or "subvolid") while the "loader" and "initrd" fields (the former may also be nested within the "options" field) remain unaffected. Finally, it saves the generated manual boot stanzas in separate config files (outputs them to a subdirectory) and includes each file in the main config file so as not to needlessly clutter it.Generates new manual boot stanzas from identified ones where every relevant field is aligned with each selected snapshot.Deletes outdated previously created writable snapshots (if any exist).Aligns the root mount point in the fstab file of each selected snapshot with the snapshot itself.creates new writable snapshots from them in the configured location.sets their read-only flag to false, thus making them writable.Selects the configured number of latest snapshots and uses them as such if they are writable and if any aren't, it either (depending on the configuration):.Searches for rEFInd's main config file on the ESP and parses it to extract manual boot stanzas from it (included configs are also analyzed, if present).Searches for snapshots of the identified subvolume in the configured directory (or directories).Identifies the root mount point and gathers information about the subvolume which is mounted at said mount point.Gathers information about mounted filesystems (from mtab) which are present on all of the found block devices.Identifies the ESP (either by GPT GUID or MBR ID).Gathers information about block devices present in the system.It is to rEFInd what grub-btrfs is to GRUB. This tool is used to automate a few tedious tasks required to boot into Btrfs snapshots from rEFInd.