systemd-bless-boot.service, systemd-bless-boot - Mark
          current boot process as successful



          systemd-bless-boot.service is a system service that marks
          the current boot process as successful. It's automatically
          pulled into the initial transaction when systemd-bless-
          boot-generator(8) detects that systemd-boot(7) style boot
          counting is used.

          Internally, the service operates based on the
          LoaderBootCountPath EFI variable (of the vendor UUID
          4a67b082-0a4c-41cf-b6c7-440b29bb8c4), which is passed from
          the boot loader to the OS. It contains a file system path
          (relative to the EFI system partition) of the m[blue]Boot
          Loader Specificationm[][1] compliant boot loader entry file
          or unified kernel image file that was used to boot up the
          system.  systemd-bless-boot.service removes the two 'tries
          done' and 'tries left' numeric boot counters from the
          filename, which indicates to future invocations of the boot
          loader that the entry has completed booting successfully at
          least once. (This service will hence rename the boot loader
          entry file or unified kernel image file on the first
          successful boot.)

          The /lib/systemd/system-bless-boot executable may also be
          invoked from the command line, taking one of the following
          command arguments:

              The current status of the boot loader entry file or
              unified kernel image file is shown. This outputs one of
              "good", "bad", "indeterminate", "clean", depending on
              the state and previous invocations of the command. The
              string "indeterminate" is shown initially after boot,
              before it has been marked as "good" or "bad". The string
              "good" is shown after the boot was marked as "good" with
              the good command below, and "bad" conversely after the
              bad command was invoked. The string "clean" is returned
              when boot counting is currently not in effect.

              This command is implied if no command argument is

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              When invoked, the current boot loader entry file or
              unified kernel image file will be marked as "good",
              executing the file rename operation described above.
              This command is intended to be invoked at the end of a
              successful boot. The systemd-bless-boot.service unit
              invokes this command.

              When called the 'tries left' counter in the boot loader
              entry file name or unified kernel image file name is set
              to zero, marking the boot loader entry or kernel image
              as "bad", so that the boot loader won't consider it
              anymore on future boots (at least as long as there are
              other entries available that are not marked "bad" yet).
              This command is normally not executed, but can be used
              to instantly put an end to the boot counting logic if a
              problem is detected and persistently mark the boot entry
              as bad.

              This command undoes any marking of the current boot
              loader entry file or unified kernel image file as good
              or bad. This is implemented by renaming the boot loader
              entry file or unified kernel image file back to the path
              encoded in the LoaderBootCountPath EFI variable.

          -h, --help
              Print a short help text and exit.

              Print a short version string and exit.

          systemd(1), systemd-boot(7), systemd.special(7)

           1. Boot Loader Specification

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