ARM and other SoC/SBC

• (2023/06/10) How to disable rootfs autoexpand on first boot.
• (2021/02/24) If your Rpi3b+ wlan0 is acting up, freezing ssh connections if you so much as vi or ls -al or top, then reducing MTU may work for you. You may also want to iwconfig wlan0 power off and add IPQoS 0x00 to /etc/ssh/sshd_config.
• Use a Raspberry Pi as a DLNA renderer.
• Flashing PWM LEDs from Linux can be useful for debugging headless devices.
• Odroid releases custom Ubuntu builds. Stock Debian can be installed but has some hiccups. Notably, as of 2018/08, the JMicron USB3-SATA bridge is flaky and becomes visible only on a warm reboot. Some additional useful packages: dialog net-tools bind9-host dnsutils resolvconf curl ntp rsync ethtool nmap telnet smartmontools hdparm sysstat lsscsi usbutils.
• Handy Odroid pages: JMicron firmware update, SATA spin-down issue.
• To force Uboot to boot from mmc instead of nand flash, follow these instructions. I changed boot_targets to list mmc0 first.
• The joys of booting Linux on ARM devices like Rpi3B+ and PcDuino3b. The official Rpi3B+ page gives you NOOBS, which you can use to install Raspbian, as hosted by Rpi, to a uSD card. Older versions are archived here. But this uSD card may not be able to boot up a PcDuino3b (even if it can, the Ethernet will not work with kernels after March 2018). For PcDuino3b, you have to build a uSD card from one of the images at the Armbian site. Conversely, this image will not be able to boot up a Rpi3B+. Images for other boards are here.