Dualbooting: Difference between revisions

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= General =
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.
 
Assume you have a box where you run Ubuntu ''(or your favourite distro)''.<BR>
Now you would like to be able to boot either Ubuntu or Alpine.


= Prepare your hardware =
= Prepare your hardware =
You will need a partition for your Alpine installation.<BR>
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.<BR>
''(The tools you use for managing your partitions might differ, so you need to figure out your self how to use them)''


Make notes of what partition you will use for your Alpine installation.<BR>
Make notes of what partition you will use for your Alpine installation. In this example we are going to install Alpine on '''/dev/sda3'''.
''('''Note:''' In this example we are going to install Alpine on '''/dev/sda3''')''


= Installing Alpine on HDD =
= Installing Alpine on HDD =


Now the fun begins... it's time to install Alpine.<BR>
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 on CD using latest Alpine Standard iso from [http://alpinelinux.org/downloads Downloads].


== Format and mount HDD partition ==
== Format and mount HDD partition ==


First we want to format your partition. We will need some tools for doing the formatting ''(we remove them when formatting is done)''.
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}}
{{Warning|Make sure you format the right partition! The {{Path|/dev/sda3}} is only a example.}}


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}}


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<!-- 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.-->
In Alpine 2.2.2 or earlier, just type:
{{Cmd|setup-alpine}}


== Install Alpine ==
== Install Alpine ==
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If using Alpine Linux 2.2.3 or higher, just type:
If using Alpine Linux 2.2.3 or higher, just type:
{{Cmd|setup-disk -m sys /mnt}}
{{Cmd|setup-disk -m sys /mnt}}
See [[setup-disk]] for more details.


If using an earlier version of Alpine Linux, you'll need to install the files and bootloader manually, as described below.
If using an earlier version of Alpine Linux, you'll need to install the files and bootloader manually, as described below.
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=== Installing bootloader manually ===
=== Installing bootloader manually ===


On your system you already have a bootloader of some kind.<BR />
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.<BR />
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.
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I edited the file so it looks something like this:
I edited the file so it looks something like this:
<PRE>#!/bin/sh
<pre>#!/bin/sh
exec tail -n +3 $0
exec tail -n +3 $0
echo "Adding Alpine" >&2
echo "Adding Alpine" >&2
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  initrd /boot/initramfs-grsec
  initrd /boot/initramfs-grsec
}
}
EOF</PRE>
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.)
{{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.<BR>
Now it's time to test. Reboot your box.
Reboot your box.<BR>
{{Note|You might need to press SHIFT when booting up your box in order to see the grub-menu.}}
''('''Note:''' You might need to press SHIFT when booting up your box in order to see the grub-menu.)''


[[Category:Installation]]
[[Category:Installation]]

Revision as of 09:25, 31 May 2012

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

Warning: Make sure you format the right partition! The /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 /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.


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

If using an earlier version of Alpine Linux, you'll need to install the files and bootloader manually, as described below.

Installing files manually

Tip: If using a version of Alpine Linux older than 2.2.0, replace /etc/apk/world in the last line with /var/lib/apk/world

lbu package /tmp/tmp.apkovl.tar.gz cd /mnt tar -xzf /tmp/tmp.apkovl.tar.gz apk add --root /mnt --initdb --repositories-file /etc/apk/repositores --keys-dir \ /etc/apk/keys $(cat /etc/apk/world) acct linux-grsec 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
exec tail -n +3 $0
echo "Adding Alpine" >&2
cat << EOF
menuentry "Alpine Linux" {
 set root=(hd0,3)
 linux /boot/vmlinuz-grsec root=UUID=8de6973a-4a8c-40ed-b710-c4e2b42d6b7a modules=sd-mod,usb-storage,ext3 quiet
 initrd /boot/initramfs-grsec
}
EOF
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

update-grub2

Now it's time to test. Reboot your box.

Note: You might need to press SHIFT when booting up your box in order to see the grub-menu.