Netboot images are deprecated (not available at all for 20.10+) so debootstrap utility is used instead. I will install
minimal Plasma desktop and enable OEM mode. Then I can create my user account from within OEM session.
It seems like Chromium DEB is no longer updated, which is a huge security risk (v87 in repos, v89 upstream). "Sources list from 18.04" section is now removed, it is recommended to use Flatpak instead.
- Ubiquity will crash if you pick system language other than English. You can change language later using either KDE
System Settings (already installed) or
gnome-language-selectorutility (fromlanguage-selector-gnomepackage). - If you get squares instead of valid fonts when using Flatpak application, try to clear font cache
- Command line:
flatpak run --command=fc-cache <APPLICATION_ID> -f
- Command line:
Created with GParted
| Partition | Mount point | Format | Size | Flags |
|---|---|---|---|---|
| /dev/sda1 | /boot/efi | VFAT | 128MiB | boot, esp |
| /dev/sda2 | / | EXT4 | max | (n/a) |
| /dev/sda3 | (n/a) | swap | 8GiB | swap |
apt install debootstrap
mkdir /target
mount /dev/sda2 /target
mkdir -p /target/boot/efi
mount /dev/sda1 /target/boot/efi
swapon /dev/sda3
debootstrap --variant=minbase --arch=amd64 focal /target
for i in dev proc sys
do
mount --bind /$i /target/$i
done
chroot /target /bin/bash
export PS1="(chroot) $PS1"
export DEBIAN_FRONTEND=noninteractive
cat << EOF > /etc/apt/sources.list
deb http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse
EOF
cat << EOF > /etc/apt/preferences.d/99-disabled
Package: snapd
Pin: release *
Pin-Priority: -1
Package: unattended-upgrades
Pin: release *
Pin-Priority: -1
Package: apport
Pin: release *
Pin-Priority: -1
EOF
apt update
apt dist-upgrade
Warning: these are example UUID values, make sure you're using the correct ones!
cat << EOF > /etc/fstab
UUID=11111111-1111-1111-1111-111111111111 / ext4 errors=remount-ro 0 1
UUID=0000-0000 /boot/efi vfat umask=0077 0 1
UUID=22222222-2222-2222-2222-222222222222 none swap sw 0 0
EOF
apt install linux-generic grub-efi-amd64
grub-install /dev/sda
Plasma and Xorg will be installed as a dependency
apt install sddm sddm-theme-breeze
Absolute minimum IMO:
apt install plasma-nm konsole
Nice to have:
apt install ark dolphin fonts-noto-color-emoji gwenview kde-spectacle kwrite okular
Useful GNOME stuff:
apt install baobab gnome-calculator gnome-clocks gnome-disk-utility
Flatpak version available in Ubuntu repositories is out of date (confirmed with Chromium). Use PPA for the latest version:
add-apt-repository ppa:alexlarsson/flatpak
apt install flatpak plasma-discover-backend-flatpak
Flathub is the most popular app repository for Flatpak:
flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
Installation example for Chromium:
flatpak install flathub org.chromium.Chromium
cat << EOF > /etc/NetworkManager/conf.d/10-globally-managed-devices.conf
[keyfile]
unmanaged-devices=none
EOF
echo "RESUME=UUID=22222222-2222-2222-2222-222222222222" > /etc/initramfs-tools/conf.d/resume
update-initramfs -u -k all
sed -i 's/quiet splash/resume=UUID=22222222-2222-2222-2222-222222222222 hibernate=nocompress/g' /etc/default/grub
update-grub2
Might be necessary if you have multiple IDEs opened at the same time
echo "fs.inotify.max_user_watches=131072" >> /etc/sysctl.d/99-sysctl.conf
Ignore The unit files have no installation config errors
apt install oem-config-kde
oem-config-prepare
exit
umount /target/{proc,sys,dev,boot/efi,}
And follow the on-screen instructions :)