Migrate to Devuan Ascii
This document describes how to migrate to Devuan Ascii from Debian Jessie or Stretch. Currently migration to ASCII from Debian Jessie or Stretch is not straight forward if you use GNOME or network manager due to some held packages, and each respective migration is a little different but this should work round the issues in both cases.
Migrating from the GNOME desktop
Because there is no transitional package yet GNOME users will need to install xfce4 and slim manually. Choose slim as the default display manager when prompted.
root@debian:~# apt-get install xfce4 slim
Set the session manager to startxfce4 so that the new desktop can be used later.
root@debian:~# update-alternatives --config x-session-manager
Replacing network manager with wicd
If you are relying on network manager for network access you need to change to wicd now. Another option is manual network configuration. Due to a lack of compatible network configuration in Stretch, if you are upgrading remotely you MUST use manual network configuration or the remote host WILL become unavailable. This requires creating /etc/network/interfaces manually before attempting the upgrade.
root@debian:~# apt-get install wicd
Make sure network manager is removed from the boot process.
root@debian:~# update-rc.d -f network-manager remove
Wireless connections should now be configured to automatically connect with wicd. Stop network manager before configuring your network.
root@debian:~# /etc/init.d/network-manager stop
Perform the migration
Devuan uses sysvinit by default so we will install this now.
root@debian:~# apt-get install sysvinit-core
A reboot is required to switch sysvinit to pid1 so we can remove systemd.
We can now remove systemd without any complaints.
root@debian:~# apt-get purge systemd
Edit the sources.list file so that we can switch to the Devuan repositories.
root@debian:~# editor /etc/apt/sources.list
Add the Devuan mirrors with the ascii codename. Comment out any other lines.
deb http://deb.devuan.org/merged ascii main deb http://deb.devuan.org/merged ascii-updates main deb http://deb.devuan.org/merged ascii-security main deb http://deb.devuan.org/merged ascii-backports main
Update the package indexes so we can install the Devuan archive keyring.
root@debian:~# apt-get update
Install the Devuan keyring so packages can be authenticated from this point onwards.
root@debian:~# apt-get install devuan-keyring --allow-unauthenticated
Update the package indexes again so that they are authenticated with the keyring.
root@debian:~# apt-get update
Finally we can migrate to Devuan.
root@debian:~# apt-get dist-upgrade
Post migration tasks
systemd components should now be removed from the system.
root@devuan:~# apt-get purge systemd-shim
If you are not using D-Bus or xorg you might be able to remove libsystemd0.
root@devuan:~# apt-get purge libsystemd0
Purge any orphaned packages left over from your previous Debian install.
root@devuan:~# apt-get autoremove --purge
This is a good time to clean out old package archives left over from your Debian system.
root@devuan:~# apt-get autoclean
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