Boot 用 SD カードの準備 で作成した SD カードをセットし、DIPSW を 1 から [OFF - ON - OFF - ON] に設定し、電源を投入します。

omap-hsmmc omap4-hsmmc0: registered as omap4-hsmmc0
mci0: registered disk0
m25p80 m25p800: m25p16 (2048 Kbytes)
booting from MMC  <----------------------- SD カードに配置した Bootloader から起動している


barebox 2013.12.0-00423-gbcf05ea0c #843 Mon Oct 15 20:13:28 JST 2018


Board: plum-ma[1GiB]
nand: ONFI param page 0 valid
nand: ONFI flash detected
... 略 ...
UBI: available PEBs: 0, total reserved PEBs: 2040, PEBs reserved for bad PEB handling: 40

Hit m for menu or any other key to stop autoboot:  0
booting mmc
   Image Name:   Linux-4.19.9+
   Created:      2018-12-14   7:47:38 UTC
   OS:           Linux
   Architecture: ARM
   Type:         Kernel Image
   Compression:  uncompressed
   Data Size:    3646728 Bytes = 3.5 MiB
   Load Address: 80008000
   Entry Point:  80008000

Loading OS U-Boot uImage '/boot/uImage'
Loading devicetree from '/boot/plum-ma.dtb'
plum_of_fixup: eXternal I/O board's ID is 0x03, fixup device-tree...
commandline: ubi.mtd=UBI mtdoops.mtddev=OOPS mtdoops.record_size=8192 zswap.enabled=1  root=/dev/mmcblk0p2 rootfstype=ext4 rw rootwait  console=ttyO0,115200  reset_cause=RST usbcore.autosuspend=-1  mtdparts=omap2-nand.0:255M(UBI),-(OOPS) 
booting kernel with devicetree
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.19.9+ (root@ryzen7) (gcc version 7.3.0 (Ubuntu/Linaro 7.3.0-27ubuntu1~18.04)) #22 PREEMPT Fri Dec 14 16:47:16 JST 2018
[    0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000] OF: fdt: Machine model: Century Systems Plum-MA
... 略 ...
[  OK  ] Reached target Network.
         Starting Permit User Sessions...
         Starting OpenBSD Secure Shell server...
[  OK  ] Started Permit User Sessions.
         Starting Set console scheme...
[  OK  ] Started Serial Getty on ttyO0.
[  OK  ] Started Set console scheme.

Ubuntu 18.04.1 LTS plum ttyO0

plum login: 

コンソールもしくは SSH でログインし、Docker の導入を進めます。

Welcome to Ubuntu 18.04.1 LTS (GNU/Linux 4.19.9+ armv7l)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

Last login: Tue Dec 18 13:55:20 2018 from 192.168.253.1
user1@plum:~$