參考資訊：
https://wiki.postmarketos.org/wiki/Nokia_N900
https://github.com/postmarketOS/pmbootstrap/releases
https://wiki.bibanon.org/Installing_postmarketOS_on_the_Nokia_N900
步驟如下：
$ cd
$ sudo apt-get install python3.0 qemu-user-static
$ git clone https://gitlab.com/postmarketOS/pmbootstrap
$ cd pmbootstrap
$ ./pmbootstrap.py init
[02:20:05] Location of the 'work' path. Multiple chroots (native, device arch, device rootfs) will be created in there.
[02:20:05] Work path []: /home/steward/.local/var/pmbootstrap
[02:20:07] NOTE: pmaports path: /home/steward/.local/var/pmbootstrap/cache_git/pmaports
[02:20:07] Choose your target device vendor (either an existing one, or a new one for porting).
[02:20:07] Available vendors (39): amazon, asus, bq, chuwi, fairphone, finepower, google, gp, htc, huawei, infocus, jolla, leeco, lenovo, lg, meizu, motorola, nextbit, nokia, oneplus, oppo, ouya, pine64, planet, purism, qemu, raspberry, samsung, semc, sony, surftab, t2m, tablet, teclast, wiko, wileyfox, wingtech, xiaomi, zte
[02:20:07] Vendor [nokia]:
[02:20:08] Available codenames (4): frt, n9, n900, rm885
[02:20:08] Device codename [n900]:
[02:20:09] This device has proprietary components, which trade some of your freedom with making more peripherals work.
[02:20:09] We would like to offer full functionality without hurting your freedom, but this is currently not possible for your device.
[02:20:09] device-nokia-n900-nonfree-firmware: Wifi firmware
[02:20:09] Enable this package? (y/n) [y]:
[02:20:12] Available keymaps for device (3): us/rx51_us, ch/rx51_ch, it/rx51_it
[02:20:12] Keymap [us/rx51_us]:
[02:20:13] Username [steward]:
[02:20:14] Available user interfaces (12):
[02:20:14] * none: No graphical environment
[02:20:14] * hildon: (X11) Lightweight GTK+2 UI (optimized for single-touch touchscreens)
[02:20:14] * i3wm: (X11) Tiling WM (keyboard required)
[02:20:14] * kodi: (Wayland) 10-foot UI useful on TV's
[02:20:14] * matchbox: (X11) Very basic user interface for handhelds
[02:20:14] * mate: (X11) MATE Desktop Environment, fork of GNOME2 (stylus recommended)
[02:20:14] * phosh: (Wayland) Mobile UI developed for the Librem 5 (does not work for armhf)
[02:20:14] * plasma-mobile: (Wayland) Mobile variant of KDE Plasma, optimized for touchscreen (slow without hardware acceleration!)
[02:20:14] * plasma-mobile-extras: Plasma Mobile with more apps pre-installed (video and music players, pdf reader, etc.)
[02:20:14] * shelli: Plain console with touchscreen gesture support
[02:20:14] * sway: (Wayland) Tiling WM, drop-in replacement for i3wm (DOES NOT RUN WITHOUT HW ACCELERATION!)
[02:20:14] * weston: (Wayland) Reference compositor (demo, not a phone interface)
[02:20:14] * xfce4: (X11) Lightweight GTK+2 desktop (stylus recommended)
[02:20:14] User interface []: i3wm
[02:20:20] Build options: Parallel jobs: 5, ccache per arch: 5G
[02:20:20] Change them? (y/n) [n]:
[02:20:22] Additional packages that will be installed to rootfs. Specify them in a comma separated list (e.g.: vim,file) or "none"
[02:20:22] Extra packages []: alsa-utils,linux-firmware-ti-connectivity,xf86-video-vesa,mesa-egl,linux-firmware,xfce4-terminal
[02:20:42] Your host timezone: posixrules
[02:20:42] Use this timezone instead of GMT? (y/n) [y]:
[02:20:43] Device hostname (short form, e.g. 'foo') [n900]:
[02:20:45] Zap existing chroots to apply configuration? (y/n) [y]:
[sudo] password for steward:
[02:20:52] % rm -rf /home/steward/.local/var/pmbootstrap/chroot_native
[02:20:52] % rm -rf /home/steward/.local/var/pmbootstrap/chroot_buildroot_armv7
[02:20:52] % rm -rf /home/steward/.local/var/pmbootstrap/chroot_rootfs_nokia-n900
[02:20:53] Cleared up ~1751 MB of space
[02:20:53] WARNING: The applications in the chroots do not get updated automatically.
[02:20:53] Run 'pmbootstrap zap' to delete all chroots once a day before working with pmbootstrap!
[02:20:53] It only takes a few seconds, and all packages are cached.
[02:20:53] Done!
$ ./pmbootstrap.py install --sdcard /dev/mmcblk0
[02:21:23] *** (1/5) PREPARE NATIVE CHROOT ***
[02:21:23] (native) install alpine-base
[02:21:25] (native) install cryptsetup util-linux e2fsprogs parted dosfstools
[02:21:26] *** (2/5) CREATE DEVICE ROOTFS ("nokia-n900") ***
[02:21:26] (native) install qemu-arm
[02:21:27] Register qemu binfmt (arm)
[02:21:27] (rootfs_nokia-n900) install alpine-base
[02:21:33] (rootfs_nokia-n900) install postmarketos-base ttf-droid device-nokia-n900 device-nokia-n900-nonfree-firmware postmarketos-ui-xfce4 xfce4-terminal
[02:23:55] (rootfs_nokia-n900) write /etc/os-release
[02:23:56] (rootfs_nokia-n900) install
[02:24:01] (rootfs_nokia-n900) mkinitfs postmarketos-stable
[02:24:09] *** SET LOGIN PASSWORD FOR: 'steward' ***
New password:
Retype new password:
passwd: password updated successfully
* WARNING: loadkmap is already starting
[02:26:44] *** (3/5) PREPARE INSTALL BLOCKDEVICE ***
[02:26:45] (native) mount /dev/install (host: /dev/mmcblk0)
[02:26:45] WARNING: This device has a previous installation of pmOS. CONTINUE? (y/n) [n]: y
[02:26:47] (native) partition /dev/install (boot: 56M, root: the rest)
[02:26:48] (native) format /dev/installp2
[02:27:06] (native) mount /dev/installp2 to /mnt/install
[02:27:07] (native) format /dev/installp1 (boot, ext2), mount to /mnt/install/boot
[02:27:07] *** (4/5) FILL INSTALL BLOCKDEVICE ***
[02:27:07] (native) copy rootfs_nokia-n900 to /mnt/install/
[02:28:01] *** (5/5) FLASHING TO DEVICE ***
[02:28:01] Run the following to flash your installation to the target device:
[02:28:01] * pmbootstrap flasher flash_kernel
[02:28:01] Flashes the kernel + initramfs to your device:
[02:28:01] /home/steward/.local/var/pmbootstrap/chroot_rootfs_nokia-n900/boot
[02:28:01] * If the above steps do not work, you can also create symlinks to the generated files with 'pmbootstrap export' and flash outside of pmbootstrap.
[02:28:01] NOTE: chroot is still active (use 'pmbootstrap shutdown' as necessary)
[02:28:01] Done
$ ./pmbootstrap.py shutdown
[02:29:13] Unregister qemu binfmt (arm)
[02:29:13] Done
P.S. Work路徑必須位於$HOME/.local/var/pmbootstrap
Maemon
$ sudo vim /etc/bootmenu.d/10-pmos.item
ITEM_NAME="postmarketOS"
ITEM_SCRIPT="boot.scr"
ITEM_DEVICE="${EXT_CARD}p1"
ITEM_FSTYPE="ext2"
$ u-boot-update-bootmenu
完成