Dualbooting: Difference between revisions
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{{Warning|The information on this page is outdated and does not work with the recent versions of Alpine Linux}} | |||
Assume you have a box where you run Ubuntu | Assume you have a box where you run Ubuntu or your favourite distro. Now you would like to be able to boot either your already installed system or Alpine. | ||
Now you would like to be able to boot either | |||
= Prepare your hardware = | = Prepare your hardware = | ||
You will need a partition for your Alpine installation. | You will need a partition for your Alpine installation. If you don't already have one free, you need to create a primary partition with enough space for your Alpine installation. The tools you use for managing your partitions might differ, so you need to figure out your self how to use them. <tt>fdisk</tt> can help. | ||
If you don't already have one free, you need to create a primary partition with enough space for your Alpine installation. | |||
Make notes of what partition you will use for your Alpine installation. | Make notes of what partition you will use for your Alpine installation. In this example we are going to install Alpine on '''/dev/sda3'''. | ||
= Installing Alpine on HDD = | = Installing Alpine on HDD = | ||
Now | Now it's time to install Alpine. Boot your system with a CD containing the latest Alpine Standard from [http://alpinelinux.org/downloads Downloads]. | ||
Boot | |||
== Format and mount HDD partition == | == Format and mount HDD partition == | ||
First | First format your partition. We will need some tools for doing the formatting. After you are done those tools can be removed. | ||
{{Cmd|apk add e2fsprogs | {{Cmd|apk add e2fsprogs | ||
mkfs.ext3 /dev/sda3 | mkfs.ext3 /dev/sda3 | ||
apk del e2fsprogs}} | apk del e2fsprogs}} | ||
Mount the newly formatted partition | {{Warning|Make sure you format the right partition! The {{Path|/dev/sda3}} is only a example. If you choose the wrong partition your data will be gone. Make a backup first when you are unsure.}} | ||
Mount the newly formatted partition. After the mounting the partition will be available at {{Path|/mnt}}. | |||
{{Cmd|mount -t ext3 /dev/sda3 /mnt}} | {{Cmd|mount -t ext3 /dev/sda3 /mnt}} | ||
Line 37: | Line 34: | ||
setup-sshd | setup-sshd | ||
setup-ntp}} | setup-ntp}} | ||
See [[setup-alpine]] for more details. (If you omit the <code>-q</code> flag to <code>setup-alpine</code>, you'll be prompted "Which disks yous you like to use?" Answer "none", and also answer "none" to the remaining prompts, about storing configs and an apk cache directory.) | |||
<!-- If the "answerfile" functionality of setup-alpine is changed to permit specifying "-m none" for setup-disk, this sequence could be expressed more concisely.--> | <!-- If the "answerfile" functionality of setup-alpine is changed to permit specifying "-m none" for setup-disk, this sequence could be expressed more concisely.--> | ||
== Install Alpine == | == Install Alpine == | ||
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{{Cmd|setup-disk -m sys /mnt}} | {{Cmd|setup-disk -m sys /mnt}} | ||
If using an earlier version of Alpine Linux, you'll need to install the files and bootloader manually, as described below. | {{Tip|If you use extlinux and you didn't create a separate boot partition ({{Path|/boot}} is on the root partition {{Path|/}}), you might need to update the path to vmlinuz in {{Path|/boot/extlinux.conf}}, eg.: | ||
<pre>[...] | |||
LABEL hardened | |||
MENU DEFAULT | |||
MENU LABEL Linux hardened | |||
LINUX /boot/vmlinuz-hardened | |||
INITRD /boot/initramfs-hardened | |||
[...]</pre> | |||
}} | |||
If using an earlier version of Alpine Linux, you'll need to install the files and [[Bootloaders|bootloader]] manually, as described below. | |||
=== Installing files manually === | === Installing files manually === | ||
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{{Tip|If using a version of Alpine Linux older than 2.2.0, replace {{Path|/etc/apk/world}} in the last line with {{Path|/var/lib/apk/world}}}} | {{Tip|If using a version of Alpine Linux older than 2.2.0, replace {{Path|/etc/apk/world}} in the last line with {{Path|/var/lib/apk/world}}}} | ||
{{Cmd|lbu package | {{Cmd|lbu package - {{!}} tar -C /mnt -xzf - | ||
apk add --root /mnt --initdb --repositories-file /etc/apk/repositories --keys-dir \ | |||
/etc/apk/keys $(cat /etc/apk/world) acct linux-hardened alpine-base}} | |||
apk add --root /mnt --initdb --repositories-file /etc/apk/ | |||
/etc/apk/keys $(cat /etc/apk/world) acct linux- | |||
Your system is now on {{Path|/dev/sda3}}. Next thing is to be able to boot on it. | Your system is now on {{Path|/dev/sda3}}. Next thing is to be able to boot on it. | ||
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=== Installing bootloader manually === | === Installing bootloader manually === | ||
On your system you already have a bootloader of some kind. | On your system you already have a bootloader of some kind. The bootloaders vary, so you need to figure out how to make it boot your Alpine distro. Hopefully you get some ideas by looking at the following example below. | ||
The bootloaders vary, so you need to figure out how to make it boot your Alpine distro. | |||
Hopefully you get some ideas by looking at the following example below. | |||
In my case I have Grub2 so I will describe what I did to boot Alpine. | In my case I have Grub2 so I will describe what I did to boot Alpine. | ||
Line 83: | Line 85: | ||
I edited the file so it looks something like this: | I edited the file so it looks something like this: | ||
< | <pre>#!/bin/sh | ||
echo "Adding Alpine" >&2 | echo "Adding Alpine" >&2 | ||
cat << EOF | cat << EOF | ||
menuentry "Alpine Linux" { | menuentry "Alpine Linux" { | ||
set root=(hd0,3) | set root=(hd0,3) | ||
linux /boot/vmlinuz- | linux /boot/vmlinuz-hardened root=UUID=8de6973a-4a8c-40ed-b710-c4e2b42d6b7a modules=sd-mod,usb-storage,ext3 quiet | ||
initrd /boot/initramfs- | initrd /boot/initramfs-hardened | ||
} | } | ||
EOF</ | EOF</pre> | ||
{{Note|The UUID-value mentioned above '8de6973a-4a8c-40ed-b710-c4e2b42d6b7a' should be replaced with the UUID you got when running your 'blkid' command.}} | |||
We need to tell grub2 that the config has changed | We need to tell grub2 that the config has changed | ||
{{Cmd|update-grub2}} | {{Cmd|update-grub2}} | ||
Now it's time to test. | Now it's time to test. Reboot your box. | ||
Reboot your box. | {{Note|You might need to press SHIFT when booting up your box in order to see the grub-menu.}} | ||
[[Category:Installation]] |
Revision as of 23:31, 27 January 2019
Assume you have a box where you run Ubuntu or your favourite distro. Now you would like to be able to boot either your already installed system or Alpine.
Prepare your hardware
You will need a partition for your Alpine installation. If you don't already have one free, you need to create a primary partition with enough space for your Alpine installation. The tools you use for managing your partitions might differ, so you need to figure out your self how to use them. fdisk can help.
Make notes of what partition you will use for your Alpine installation. In this example we are going to install Alpine on /dev/sda3.
Installing Alpine on HDD
Now it's time to install Alpine. Boot your system with a CD containing the latest Alpine Standard from Downloads.
Format and mount HDD partition
First format your partition. We will need some tools for doing the formatting. After you are done those tools can be removed.
apk add e2fsprogs mkfs.ext3 /dev/sda3 apk del e2fsprogs
Mount the newly formatted partition. After the mounting the partition will be available at /mnt.
mount -t ext3 /dev/sda3 /mnt
Basic setup
Next, do some basic setup for your Alpine system.
In Alpine 2.2.3 or newer, type:
setup-timezone setup-alpine -q setup-sshd setup-ntp
See setup-alpine for more details. (If you omit the -q
flag to setup-alpine
, you'll be prompted "Which disks yous you like to use?" Answer "none", and also answer "none" to the remaining prompts, about storing configs and an apk cache directory.)
Install Alpine
Now it's time to put our files on the partition.
If using Alpine Linux 2.2.3 or higher, just type:
setup-disk -m sys /mnt
[...] LABEL hardened MENU DEFAULT MENU LABEL Linux hardened LINUX /boot/vmlinuz-hardened INITRD /boot/initramfs-hardened [...]
If using an earlier version of Alpine Linux, you'll need to install the files and bootloader manually, as described below.
Installing files manually
lbu package - | tar -C /mnt -xzf - apk add --root /mnt --initdb --repositories-file /etc/apk/repositories --keys-dir \ /etc/apk/keys $(cat /etc/apk/world) acct linux-hardened alpine-base
Your system is now on /dev/sda3. Next thing is to be able to boot on it.
Installing bootloader manually
On your system you already have a bootloader of some kind. The bootloaders vary, so you need to figure out how to make it boot your Alpine distro. Hopefully you get some ideas by looking at the following example below.
In my case I have Grub2 so I will describe what I did to boot Alpine.
Reboot your system (start Ubuntu).
Start a 'terminal' (ALT-F2 + "terminal" + [Run])
Take notes of the UUID of the partition you are planning to use:
sudo blkid /dev/sda3
Start editing grub2 configuration
gksudo gedit /etc/grub.d/40_custom
I edited the file so it looks something like this:
#!/bin/sh echo "Adding Alpine" >&2 cat << EOF menuentry "Alpine Linux" { set root=(hd0,3) linux /boot/vmlinuz-hardened root=UUID=8de6973a-4a8c-40ed-b710-c4e2b42d6b7a modules=sd-mod,usb-storage,ext3 quiet initrd /boot/initramfs-hardened } EOF
We need to tell grub2 that the config has changed
update-grub2
Now it's time to test. Reboot your box.