[Trigger] Operation = Install Operation = Upgrade Type = Package Target = grub [Action] Description = Signing GRUB for SecureBoot When = PostTransaction Exec = /usr/bin/find /efi/ -name 'grubx64' -exec /usr/bin/sh -c 'if ! /usr/bin/sbverify --list {} 2>/dev/null | /usr/bin/grep -q "signature certificates"; then /usr/bin/sbsign --key /db.key --cert /db.crt --output {} {}; fi' \ ; Depends = sbsigntools Depends = findutils Depends = grep