ukify: add page (#22496)

Co-authored-by: Managor <42655600+Managor@users.noreply.github.com>
Co-authored-by: Ivan Baluta <ivanbaluta.dev@gmail.com>
Co-authored-by: Lena Pastwa <lena@lnps.me>

pages/linux/ukify.md

@@ -0,0 +1,36 @@
+# ukify
+
+> Build and sign Unified Kernel Images (UKIs).
+> More information: <https://www.freedesktop.org/software/systemd/man/latest/ukify.html>.
+
+- Build a Unified Kernel Image:
+
+`ukify build --linux {{path/to/vmlinuz}} --initrd {{path/to/initrd.img}} --cmdline "{{root=UUID=xxxx}}"`
+
+- Build a UKI with multiple initrd files:
+
+`ukify build --linux {{path/to/vmlinuz}} --initrd {{path/to/initrd1.img}} --initrd {{path/to/initrd2.img}} --cmdline "{{root=UUID=xxxx}}"`
+
+- Build a UKI, specifying the output filename:
+
+`ukify build --linux {{path/to/vmlinuz}} --initrd {{path/to/initrd.img}} --cmdline "{{root=UUID=xxxx}}" --output {{path/to/output.efi}}`
+
+- Build a UKI including CPU microcode:
+
+`ukify build --linux {{path/to/vmlinuz}} --initrd {{path/to/initrd.img}} --microcode {{path/to/microcode.img}} --cmdline "{{root=UUID=xxxx}}"`
+
+- Sign the UKI for Secure Boot:
+
+`ukify build --linux {{path/to/vmlinuz}} --initrd {{path/to/initrd.img}} --cmdline "{{root=UUID=xxxx}}" --secureboot-private-key {{path/to/private_key.pem}} --secureboot-certificate {{path/to/certificate.pem}}`
+
+- Inspect a UKI file:
+
+`ukify inspect {{path/to/uki.efi}}`
+
+- Generate signing keys:
+
+`ukify genkey --secureboot-certificate-validity {{365}}`
+
+- Display help:
+
+`ukify {{[-h|--help]}}`