Software management

2021-04-05T12:32:18Z

P: Updated the link to the archlinux bootstrap tar

If you want to run [https://www.gnu.org/software/libc/ glibc] programs in Alpine Linux, there are a few ways of doing so. You could install glibc as additional to [https://musl.libc.org/ musl] (you would have to do this manually), or you could do it the easy way and use either Flatpak (the easiest) or a chroot.<br>

Because there are different use cases, this is just a slight overview about what's possible and what's intelligent.<br>

= Your options =

== Flatpak ==

Flatpak is by far the easiest method of running any graphical glibc program on Alpine.
Firstly install it.

sudo apk add flatpak

Then you can run any Flatpak application:

flatpak run <flatpak name>

It is recommended to enable [https://flathub.org Flathub] using it's instructions [https://flatpak.org/setup/Alpine/ here], as most glibc programs you might need will be packaged there.

You can then install applications from it, for example:

flatpak install com.valvesoftware.Steam

== Chroot ==

=== Gentoo Linux ===

Select a stage3 from [https://www.gentoo.org/downloads/ here] and portage latest from [https://www.gentoo.org/downloads/mirrors/ here] at gentoo/snapshots/portage-latest.tar.xz.

First,

sudo apk add xz

Enter the chroot:
mkdir ~/chroot
cd ~/chroot
tar -xvf stage3-*.tar.xz
tar -xvf portage-latest.tar.xz
mv portage usr
sudo mount --bind /dev dev
sudo mount --bind /sys sys
sudo mount -t proc proc proc
cp /etc/resolv.conf etc
sudo chroot . /bin/bash

And voilà, you have your working Gentoo chroot!<br>

You can now take a look at [https://wiki.gentoo.org/wiki/Handbook:Main_Page Gentoo's Handbook] to find out how you can configure and install your system, or simply extract/copy the program you need to run in your chroot enviroment and execute it.

Here is a wrapper script that is similar to <code>arch-chroot</code> when you frequently reuse this chroot:

Also, create an account with the same user name as host current user to the chroot or make changes to the userspec option to chroot line.

{{Cat|gentoo-chroot.sh|<nowiki>!/bin/bash
CHROOT_PATH="/home/$USER/chroot"
cd $CHROOT_PATH
mount | grep $CHROOT_PATH/dev || sudo mount --bind /dev dev
mount | grep $CHROOT_PATH/sys || sudo mount --bind /sys sys
mount | grep $CHROOT_PATH/proc || sudo mount -t proc proc proc
cp /etc/resolv.conf etc
sudo chroot --userspec=$USER:users . /bin/bash
echo "You must manually unmount $CHROOT_PATH/dev, $CHROOT_PATH/sys, $CHROOT_PATH/proc."
</nowiki>
}}

Do at <code>chmod +x gentoo-chroot.sh</code> to get it to work.

=== Arch Linux ===

Either use '''pacstrap''' (included with the arch-install-scripts package) or an Arch bootstrap image:

sudo apk add arch-install-scripts
mkdir ~/chroot && cd ~/chroot
curl -O https://mirrors.edge.kernel.org/archlinux/iso/latest/archlinux-bootstrap-2021.04.01-x86_64.tar.gz
sudo tar xzf archlinux-bootstrap-2021.04.01-x86_64.tar.gz && rm archlinux-bootstrap-2021.04.01-x86_64.tar.gz
sudo sed -i '/evowise/s/^#//' root.x86_64/etc/pacman.d/mirrorlist
sudo sed -i '/CheckSpace/s/^/#/' root.x86_64/etc/pacman.conf
sudo arch-chroot root.x86_64
[chroot]# pacman-key --init
[chroot]# pacman-key --populate archlinux

Once that is done, update the system and install the desired package(s) (denoted by ''"foo"'' in this example):

[chroot]# pacman -Syu ''foo''

=== Debian ===

Use the provided debootstrap package to create the Debian chroot. <code>--arch</code> is optional, depending of your needs.

On the '''linux-grsec''' kernel, you will need to relax chroot limitations:

sudo apk add debootstrap
for i in /proc/sys/kernel/grsecurity/chroot_*; do echo 0 | sudo tee $i; done
mkdir ~/chroot
sudo debootstrap --arch=i386 wheezy ~/chroot http://http.debian.net/debian/
for i in /proc/sys/kernel/grsecurity/chroot_*; do echo 1 | sudo tee $i; done
sudo chroot ~/chroot /bin/bash

You can now use <code>apt-get</code> to install needed packages.

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[[Category:Installation]]

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Software management