#here a gentoo install from ubuntu live system in a kvm VM.
 
sudo su
export DEBIAN_FRONTEND=noninteractive
setxkbmap de
 
#maybe it destroy too much.
#blkdiscard /dev/sda
#sgdisk --zap-all /dev/sda
 
sgdisk -n1:0:+2G -c 1:"EFI System Partition" -t 1:ef00 /dev/sda
sgdisk -n2:0:+2G -c 2:"Swap Partition" -t 2:8200 /dev/sda
sgdisk -n3:0:0 -c 3:"Linux /" -t 3:8300 /dev/sda
 
mkfs.vfat -F 32 /dev/sda1
mkswap /dev/sda2
swapon /dev/sda2
mkfs.ext4 /dev/sda3
 
mkdir --parents /mnt/gentoo
mount /dev/sda3 /mnt/gentoo
mkdir -p /mnt/gentoo/tmp
chmod 1777 /mnt/gentoo/tmp
 
#maybe URL is outdated.
wget -c https://mirror.leaseweb.com/gentoo/releases/amd64/autobuilds/current-stage3-amd64-openrc/stage3-amd64-openrc-20220911T170535Z.tar.xz -O /root/stage3.tar.xz
tar --numeric-owner --xattrs -xvJpf /root/stage3.tar.xz -C /mnt/gentoo
 
cat > /mnt/gentoo/etc/portage/make.conf << MAKECONF
COMMON_FLAGS="-march=native -O2 -pipe"
CFLAGS="${COMMON_FLAGS}"
CXXFLAGS="${COMMON_FLAGS}"
FCFLAGS="${COMMON_FLAGS}"
FFLAGS="${COMMON_FLAGS}"
MAKEOPTS="-j2"
USE="-systemd zfs kvm qemu iscsi ssh fuse acl networkmanager elogind"
ACCEPT_LICENSE="*"
 
PORTDIR="/var/db/repos/gentoo"
DISTDIR="/var/cache/distfiles"
PKGDIR="/var/cache/binpkgs"
 
LC_MESSAGES=C
 
GRUB_PLATFORMS="efi-64"
MAKECONF
 
echo "DESKTOP-`cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 9 | head -n 1`" > /mnt/gentoo/etc/hostname
 
cat > /mnt/gentoo/etc/resolv.conf << NETWORK
nameserver 127.0.0.53
options edns0 trust-ad
search martin.ads
NETWORK
 
mount --types proc /proc /mnt/gentoo/proc
mount --rbind /sys /mnt/gentoo/sys
mount --make-rslave /mnt/gentoo/sys
mount --rbind /dev /mnt/gentoo/dev
mount --make-rslave /mnt/gentoo/dev
mount --bind /run /mnt/gentoo/run
mount --make-slave /mnt/gentoo/run
 
test -L /dev/shm && rm /dev/shm && mkdir /dev/shm
mount --types tmpfs --options nosuid,nodev,noexec shm /dev/shm
chmod 1777 /dev/shm /run/shm
 
chroot /mnt/gentoo /bin/env -i TERM=$TERM /bin/bash
 
source /etc/profile
export PS1="(chroot) $PS1"
 
mount /dev/sda1 /boot
 
emaint --auto sync
 
eselect profile set 1
 
emerge --ask --verbose --update --deep --newuse @world
emerge --depclean
 
emerge --ask app-portage/cpuid2cpuflags
echo "*/* $(cpuid2cpuflags)" > /etc/portage/package.use/00cpu-flags
 
echo "Europe/Brussels" > /etc/timezone
emerge --config sys-libs/timezone-data
 
cat > /etc/locale.gen << LANGGEN
en_US ISO-8859-1
en_US.UTF-8 UTF-8
de_DE ISO-8859-1
de_DE.UTF-8 UTF-8
LANGGEN
 
locale-gen
 
cat > /etc/env.d/02locale << LANGGENB
LANG="de_DE.UTF-8"
LC_COLLATE="C.UTF-8"
LANGGENB
 
eselect locale set 6
 
cat >> /etc/conf.d/keymaps << KEYM
keymap="de"
extended_keymaps=""
windowkeys= "YES"
dumpkeys_charset=""
fix_euro="NO"
KEYM
rc-update add keymaps boot
rc-service keymaps restart
 
env-update && source /etc/profile && export PS1="(chroot) ${PS1}"
 
emerge --ask sys-kernel/linux-firmware
 
emerge --ask sys-kernel/gentoo-sources
 
eselect kernel set 1
 
emerge --ask sys-apps/pciutils
 
emerge --ask sys-kernel/genkernel
genkernel --virtio --install --module-rebuild all
 
echo /dev/disk/by-uuid/$(blkid -s UUID -o value /dev/sda1) /boot vfat defaults,noatime 0 2 > /etc/fstab
echo /dev/disk/by-uuid/$(blkid -s UUID -o value /dev/sda2) none swap sw 0 0 >> /etc/fstab
echo /dev/disk/by-uuid/$(blkid -s UUID -o value /dev/sda3) / ext4 noatime 0 2 >> /etc/fstab
 
mkdir -p /etc/modules-load.d
 
cat >> /etc/modules-load.d/network.conf << NETWORK
3c59x
NETWORK
 
cat >> /etc/conf.d/net << NETWORKB
dns_domain_lo="WORKGROUP"
NETWORKB
 
emerge --ask net-misc/dhcpcd
rc-update add dhcpcd default
rc-service dhcpcd start
 
emerge --ask --noreplace net-misc/netifrc
 
emerge --ask sys-apps/pcmciautils
 
#enable weak passwords
cat >  /etc/security/passwdqc.conf  << PASS
#min=disabled,24,11,8,7
min=1,1,1,1,1
max=72
#passphrase=3
passphrase=0
#match=4
match=0
#similar=deny
similar=permit
random=47
#enforce=everyone
enforce=none
retry=3
PASS
 
echo 'root:p@ssw0rd'|chpasswd
 
useradd -m -G users,wheel -s /bin/bash serveradmin
echo 'serveradmin:p@ssw0rd'|chpasswd
 
emerge --ask app-admin/sysklogd
rc-update add sysklogd default
emerge --ask sys-process/cronie
rc-update add cronie default
 
crontab /etc/crontab
 
emerge --ask sys-apps/mlocate
 
rc-update add sshd default
 
cat >> /etc/inittab << INITFILE
# SERIAL CONSOLES
s0:12345:respawn:/sbin/agetty 9600 ttyS0 vt100
s1:12345:respawn:/sbin/agetty 9600 ttyS1 vt100
INITFILE
 
emerge --ask net-misc/chrony
rc-update add chronyd default
 
emerge --ask net-misc/dhcpcd
 
emerge --ask sys-boot/grub
 
grub-install --target=x86_64-efi --efi-directory=/boot --removable
 
grub-mkconfig -o /boot/grub/grub.cfg
 
exit
cd
umount -l /mnt/gentoo/dev{/shm,/pts,}
mount -R /mnt/gentoo
reboot