Installing Alpine on a USB Stick - Manual Process

This process applies to Alpine Linux 1.9.0 or later, and results in a run-from-ram style installation. See also: Installing Alpine on USB Automated

Requirements

In order to follow this document, you will need:

Alpine Linux CD-ROM (Download a .iso file containing an Alpine release.)
A USB drive (flash, external HD, card reader, etc.)

If you already have a running Linux system (Alpine Linux 2.1.x, Debian, Gentoo, RedHat, etc.), log in as root, insert the Alpine Linux CD-ROM into the running Linux computer, and skip the next section.

Boot Alpine Linux CD-ROM

Insert the Alpine Linux CD into a computer.
Boot the computer from the Alpine Linux CD-ROM.
- This step may require changes to the BIOS settings to select booting from CD.
Login with the username root. No password is needed.

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Alpine Linux has some special applications that helps you to use it in the way you want.
Some of the first scripts you are suggested to use is:

setup-alpine (Configures all basic things on your Alpine Linux)
setup-acf (was named setup-webconf before Alpine 1.9 beta 4) (Configures ACF (webconfiguration) so you can manage your box through https)

Note: Just type any of the above commands on your console and hit Enter to execute the script.

Other useful pages

Configure Networking
Setting up a SSH server (Using ssh is a good way to administer your box remotely)
Package Management (apk) (How to add/remove packages on your Alpine)
Init System (rc) (Configure a service to automatically boot at next reboot)
Alpine local backup (lbu) (Permanently store your modifications in case your box needs reboot)