Raspberry Pi

From Leo's Notes
Revision as of 06:35, 9 January 2016 by Leo (talk | contribs) (→Arch Linux)
This page was last edited on 9 January 2016, at 06:35.

Setup

Arch Linux

Setup the SD card to contain two partitions using fdisk:

  1. 100MB (W95 FAT32 (LBA))
  2. Data
# fdisk /dev/sdcard
## Set up the SD card partitions
# mkfs.vfat /dev/sdcard1
# mkfs.ext4 /dev/sdcard2
# cd /mnt
# mkdir boot root
# mount /dev/sdcard1 boot
# mount /dev/sdcard2 root
# tar -xpf ArchLinuxARM-rpi-latest.tar.gz -C root
# mv root/boot/* boot
# umount boot root

For more information, see http://archlinuxarm.org/platforms/armv6/raspberry-pi

Configuration

Wifi

See Wifi.


Miscellaneous

Control Status LEDs

See: http://www.midwesternmac.com/blogs/jeff-geerling/controlling-pwr-act-leds-raspberry-pi

Mounting /var/log as tmpfs

Append to the /etc/fstab with the following line. 

tmpfs           /var/log tmpfs nodev,nosuid,mode=0755,size=50m  0 0

This will mount /var/log as a 50MB ramdisk. If your system is using systemd, this will break systemd-journald. To fix it, you will need to create a startup script after the mount has completed that creates the journald's directory in /var/log/journal/.

Reboot the Pi for the changes to take affect, or run mount -a which will mount the ramdisk to /var/log immediately, though you'll need to restart any services that has handles to any files there.

Why would you want to do this? To limit the amount of writes that is made to the SD card to prevent premature wearing.