Raspberry Pi: Difference between revisions

Revision as of 16:26, 14 October 2015

This tutorial will help you install Alpine Linux on your Raspberry Pi.

Preparation

This section will help you format and partition your SD card:

Download Alpine for Raspberry Pi tarball which is named as alpine-rpi-<version>-armhf.rpi.tar.gz. You will need version 3.2.0 or greater if you have a Raspberry Pi 2.
Mount your SD card to your workstation
Use gnome-disks or fdisk to create a FAT32 partition. If you are using fdisk, the FAT32 partition type is called W95 FAT32 (LBA) and its ID is 0xC.
Mark the newly created partition as bootable and save
Mount the previously created partition
Extract the tarball contents to your FAT32 partition
Unmount the SD Card.

Installation

Alpine Linux will be installed as diskless mode, hence you need to use Alpine Local Backup (lbu) to save your modifications between reboots. Follow these steps to install Alpine Linux:

Insert the SD Card into the Raspberry Pi and turn it on
Login into the Alpine system as root. Leave the password empty.
Type setup-alpine
Once the installation is complete, commit the changes by typing lbu commit

Type reboot to verify that the installation was indeed successful.

Post Installation

Update the System

Upon installation, make sure that your system is up-to-date:

apk update apk upgrade

Don't forget to save the changes:

lbu commit

Clock-related error messages

During the booting time, you might notice errors related to the hardware clock. The Raspberry Pi does not have a hardware clock and therefore you need to disable the hwclock daemon and enable swclock:

rc-update add swclock boot # enable the software clock rc-update del hwclock boot # disable the hardware clock

Since Raspberry Pi does not have a clock, the Alpine Linux needs to know what the time is by using a Network Time Protocol (NTP) daemon. Make sure that you a NTP daemon installed and running. If you are not sure, then you can install NTP client by running the following command:

setup-ntp

Busybox NTP client might be the most lightweight solution. Save the changes and reboot, once the NTP software is installed and running:

lbu commit reboot

After reboot, make sure that the date command outputs the correct date and time.

@@ Line 24: / Line 24: @@
 Type <code>reboot</code> to verify that the installation was indeed successful.
+== Post Installation ==
+=== Update the System ===
+Upon installation, make sure that your system is up-to-date:
+{{cmd|apk update
+apk upgrade}}
+Don't forget to save the changes:
+{{cmd|lbu commit}}
+=== Clock-related error messages ===
+During the booting time, you might notice errors related to the hardware clock.  The Raspberry Pi does not have
+a hardware clock and therefore you need to disable the hwclock daemon and enable swclock:
+{{cmd|rc-update add swclock boot    # enable the software clock
+rc-update del hwclock boot    # disable the hardware clock}}
+Since Raspberry Pi does not have a clock, the Alpine Linux needs to know what the time is by using a
+[https://en.wikipedia.org/wiki/Network_Time_Protocol Network Time Protocol (NTP)] daemon.  Make sure that you a
+NTP daemon installed and running.  If you are not sure, then you can install NTP client by running the following
+command:
+{{cmd|setup-ntp}}
+Busybox NTP client might be the most lightweight solution.  Save the changes and reboot, once the NTP software is
+installed and running:
+{{cmd|lbu commit
+reboot}}
+After reboot, make sure that the <code>date</code> command outputs the correct date and time.
 == See Also ==
 * [[Create a bootable SDHC from a Mac]]