Installation on removable media
In order to install Liberté on a FAT/FAT32-formatted, or ext-formatted USB key, SD card, or any other kind of bootable media:
liberte-201X.Y.zipfrom the SourceForge project site. Latest version is always the default download, so just click the green button. Note that the top-level
libertefolder in all installation package types (
.ova) is exactly the same.
- Extract the archive into the top directory of the media you want to use (including the
libertearchive root) — i.e., in Windows put
D:or similar into the “Extract to …” dialog. This is all that's needed when upgrading; however, to upgrade a running Liberté instance, add
toramto the boot menu options first.
- Make the media bootable (unnecessary when upgrading or when booting using (U)EFI):
libertefolder. You will likely need to right-click and select Run as administrator in Vista and in Windows 7. Watch out for errors in the console messages. Do not permit antivirus software like Avast to run the installer in a sandbox, since the bootloader will fail to install in that case. Linux: Run
sh /media/…/liberte/setup.sh autoas root.
For virtualized environments, download
liberte-201X.Y.ova and import it into the virtual machine (Import Appliance in VirtualBox, Open in VMware, etc.). On Linux, it is also possible to immediately test-drive Liberté in QEMU / QEMU-KVM by running
liberte/qemulate.sh from an extracted
.zip archive; persistence support will be disabled (similarly to
See Secure Boot section below wrt. booting writable media that are unsupported as boot devices on given hardware (e.g., SD cards).
When upgrading, it is recommended to reset the user configuration after booting: add
nosettings to the boot menu options, remove
~/persist/settings/config.tar.xz, and reboot. Upgrading will migrate old cables communication certificates on first boot, and should not cause any usability issues.
NOTE: Older computers might be able to boot only FAT(16)-formatted USB keys — the corresponding BIOS boot option is typically
USB RMD-FDD. For such computers, installing on an HDD partition is likely a better option: use
nombr option of
setup.sh (or remove
-m -a options from
setup.bat), and chain-load the partition from your bootloader.
Liberté Linux releases are signed with a designated PGP key:
6FDD D756 110C 1B07 249F D07E 9B02 7FCD 81DE 1001
You are encouraged to verify the downloaded files using, e.g., GNU Privacy Assistant or PGP Desktop, after fetching the key from a keyserver (or downloading it using the link above), by providing the associated
*.asc file as input:
¤ gpg --verify liberte-2010.1.zip.asc gpg: Signature made Fri 19 Nov 2010 03:48:36 MSK gpg: using DSA key 0x9B027FCD81DE1001 gpg: Good signature from "Liberté Linux (Release Signing Key) <firstname.lastname@example.org>"
(U)EFI bootloader binaries are signed for Secure Boot, establishing a trusted boot chain starting with a KEK / DB certificate (located in EFI directory). The procedure for enrolling the certificate in TianoCore OVMF is as follows:
- Navigate to Device Manager → Secure Boot Configuration → Secure Boot Mode, and select Custom Mode.
- Navigate to Device Manager → Secure Boot Configuration → Custom Secure Boot Options → DB Options → Enroll Signature, load
EFI/Liberte-SecureBoot-CA.der, and commit the changes.
For real hardware, the procedure should be similar — e.g., for Dell Latitude firmware, navigate to Secure Boot → Expert Key Management → Enable Custom Mode → db: Append from File.
It is also possible to add the bootloader signature directly (by selecting, e.g.,
EFI/BOOT/BOOTx64.EFI instead of the certificate above), but this step will need to be done after each Liberté update. Adding the certificate to KEK database (instead of DB above) will let Liberté modify authenticated EFI variables at runtime — such functionality is not used at present.
If you don't want to customize Secure Boot settings, and your UEFI firmware has Microsoft's UEFI CA certificate already enrolled (which is probably the case), you can use shim instead (this assumes a
grubx64.efi, and then rename
- After booting, use shim's interface to enroll
EFI/BOOT/BOOTx64.EFIsignature, similarly to OVMF instructions above. Note that such whitelisting is visible to shim only.
With regular BIOS-based boot, only the last stage of trusted boot chain is performed: root filesystem image verification. However, a minimal bootstrap
.iso image (lacking a compressed root filesystem) is now shipped, which can be burned to read-only media and used to boot a regular install of Liberté on writable media. Such image is also useful for booting writable media that are unsupported as boot devices on given hardware (e.g., SD cards).
Bug reports, suggestions, and generic discussion are always welcome. Don't forget to rate this project on SourceForge!
If you are interested in having specific customizations implemented, please contact me by e-mail.