Gentoo Base Install Scripts

gentoo-base-chroot.sh

#!/bin/bash

gentoo="/home/gentoo"
mirror="https://ftp.belnet.be/pub/rsync.gentoo.org/gentoo/releases/amd64/autobuilds"

latest=$(curl -s ${mirror}/latest-stage3-amd64-openrc.txt | grep openrc | awk '{ print $1 }')
baselat=$(basename $latest)

mkdir -p ${gentoo}
cd ${gentoo}

wget ${mirror}/${latest} -O ${baselat}

tar xpvf ${baselat} --xattrs-include='*.*' --numeric-owner
rm -f ${baselat}

makeconf="${gentoo}/etc/portage/make.conf"
cpucount=$(($(grep -c MHz /proc/cpuinfo) + 1))

cat << EOF >> ${makeconf}

USE="bindist syslog -multilib -X -gnome -kde iproute2 btrfs lzma -cups"

LINGUAS="en"
L10N="en"

GENTOO_MIRRORS="http://gentoo.mirrors.ovh.net/gentoo-distfiles/"
PORTAGE_NICENESS="19"

ACCEPT_LICENSE="linux-fw-redistributable"

MAKEOPTS="-j${cpucount}"

EOF

mkdir -p ${gentoo}/etc/portage/repos.conf
cp ${gentoo}/usr/share/portage/config/repos.conf ${gentoo}/etc/portage/repos.conf/gentoo.conf

# set resolver for the chroot
cp -L /etc/resolv.conf ${gentoo}/etc/

mount --types proc /proc ${gentoo}/proc
mount --rbind /sys ${gentoo}/sys
mount --rbind /dev ${gentoo}/dev
mount --bind /run ${gentoo}/run

gentoo-base.sh

#!/bin/bash

disk="/dev/vda"
gentoo="/mnt/gentoo"
mirror="https://ftp.belnet.be/pub/rsync.gentoo.org/gentoo/releases/amd64/autobuilds"

# create partitions
parted ${disk} mklabel msdos
parted -a optimal ${disk} mkpart primary 0% 768MB
parted -a optimal ${disk} mkpart primary 768MB 40GB
parted -a optimal ${disk} mkpart primary 41GB 80GB
parted ${disk} set 1 boot on

partprobe ${disk}

# create and mount filesystem
mkfs.ext2 ${disk}1
mkfs.ext4 ${disk}2
mkfs.ext4 ${disk}3

mount ${disk}2 ${gentoo}

mkdir ${gentoo}/boot
mkdir ${gentoo}/home

mount ${disk}1 ${gentoo}/boot
mount ${disk}3 ${gentoo}/home

# synchronize time
chronyd -q

# fetch latest stage3 version
latest=$(curl -s ${mirror}/latest-stage3-amd64-openrc.txt | grep openrc | awk '{ print $1 }')
baselat=$(basename $latest)

cd ${gentoo}

# download and extract stage3 on the root filesystem
wget ${mirror}/${latest} -O ${baselat}

tar xpvf ${baselat} --xattrs-include='*.*' --numeric-owner
rm -f ${baselat}

makeconf="${gentoo}/etc/portage/make.conf"
cpucount=$(($(grep -c MHz /proc/cpuinfo) + 1))

# customize make.conf with minimal features
cat << EOF >> ${makeconf}

USE="bindist syslog -multilib -X -gnome -kde iproute2 btrfs lzma -cups"

LINGUAS="en"
L10N="en"

GENTOO_MIRRORS="http://gentoo.mirrors.ovh.net/gentoo-distfiles/"
PORTAGE_NICENESS="19"

ACCEPT_LICENSE="linux-fw-redistributable"

ACCEPT_KEYWORDS="~amd64"

MAKEOPTS="-j${cpucount}"

EOF

# configure original gentoo repository
mkdir -p ${gentoo}/etc/portage/repos.conf
cp ${gentoo}/usr/share/portage/config/repos.conf ${gentoo}/etc/portage/repos.conf/gentoo.conf

# set resolver for the chroot
cp -L /etc/resolv.conf ${gentoo}/etc/

# mount base system from host
mount --types proc /proc ${gentoo}/proc
mount --rbind /sys ${gentoo}/sys
mount --rbind /dev ${gentoo}/dev
mount --bind /run ${gentoo}/run

# download next script
gist="3a30133f18c72f15254bcdbbf2d97d6d"
wget -O ${gentoo}/tmp/gentoo-chroot.sh https://gist.githubusercontent.com/maxux/${gist}/raw/gentoo-chroot.sh

# chroot ${gentoo} /bin/bash
# chroot ${gentoo} /bin/bash /tmp/gentoo-chroot.sh
## Execute next script (gentoo-chroot) inside the chroot
exit 1

umount ${gentoo}/boot
umount ${gentoo}/home
umount ${gentoo}/proc
umount ${gentoo}/run
umount --recursive ${gentoo}/dev
umount --recursive ${gentoo}/sys
umount ${gentoo}

# reboot

gentoo-chroot.sh

#!/bin/bash

source /etc/profile

# make visual difference with host prompt
export PS1="(chroot) ${PS1}"

# fast way to fetch portage tree
emerge-webrsync

# clean up a bit release news
eselect news read > /dev/null

# choose no-multilib profile, pure 64 bits environment
eselect profile set default/linux/amd64/17.1/no-multilib

# set single locale
sed -i "s/#en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/" /etc/locale.gen

# set timezone
echo "Europe/Brussels" > /etc/timezone
emerge --config sys-libs/timezone-data

# upgrade system to 'unstable' (upgrade packages)
emerge -DuNv world

# reload environment
telinit u
hash -r

# apply locale change
eselect locale set en_US.utf8

env-update
source /etc/profile
export PS1="(chroot) ${PS1}"

# install some tools
emerge -v gentoolkit

# fetching latest kernel 6.1 release available and downloading it
krnl=$(equery list -po sys-kernel/vanilla-sources | awk '{ print $1 }' | grep sources-6.1)
version=${krnl:27}

emerge -v =${krnl}

# configuring kernel
cd /usr/src

ln -s linux-${version} linux
cd linux

wget http://home.maxux.net/temp/jan-config.gz
zcat jan-config.gz > .config
yes "" | make config

# reload makeopts set earlier
eval $(grep MAKEOP /etc/portage/make.conf)
make $MAKEOPTS

make install
make modules_install

cd /boot
ln -s vmlinuz-${version} vmlinuz
ln -s initramfs-${version}.img initramfs

# install firmwares
emerge -v sys-kernel/linux-firmware

# initramfs tools
emerge -v dracut sys-apps/nvme-cli

dracut --kver ${version}

# installing bootloader
emerge -v syslinux

echo >> /etc/fstab
grep ' / ' /proc/mounts | sed "s/ /\t/g" >> /etc/fstab
grep ' /boot ' /proc/mounts | sed "s/ /\t/g" >> /etc/fstab
grep ' /home' /proc/mounts | sed "s/ /\t/g" >> /etc/fstab

rootpart=$(grep ' / ' /proc/mounts | awk '{ print $1 }')
rootdisk=/dev/$(lsblk -ndo pkname $(grep ' / ' /proc/mounts | awk '{ print $1 }'))

# install bootsector
dd bs=440 conv=notrunc count=1 if=/usr/share/syslinux/mbr.bin of=${rootdisk}

# install bootloader
mkdir /boot/extlinux
extlinux --install /boot/extlinux

cd /usr/share/syslinux
cp menu.c32 memdisk libcom32.c32 libutil.c32 /boot/extlinux/

cat << EOF > /boot/extlinux/extlinux.conf
DEFAULT gentoo
LABEL gentoo
    LINUX /vmlinuz
    INITRD /initramfs
    APPEND root=${rootpart}
EOF

# installing basic management
emerge -v chrony cronie netifrc syslog-ng

# setting up root password
echo "root:root" | chpasswd

# Missing: /etc/hosts
# Missing: /etc/conf.d/net (for custom network)
# Missing: /etc/hostname and /etc/conf.d/hostname

# setup ssh
sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config

# enable services on boot time
rc-update add sshd default
rc-update add dhcpcd default
rc-update add chronyd default

syslinux-uefi.sh

#!/bin/bash

disk="/dev/sda"
partid="1"
boot="${disk}${partid}"

# Partition Type: ef (EFI System)

emerge -va dosfstools syslinux efibootmgr
mkfs.vfat ${boot}

mount ${boot} /boot
mkdir /boot/EFI

cp -rv /usr/share/syslinux/efi64 /boot/EFI/syslinux

efibootmgr --create --disk ${disk} --part ${partid} --loader /EFI/syslinux/syslinux.efi --label "SYSLINUX" --unicode

cat << EOF > /boot/EFI/syslinux/syslinux.cfg
DEFAULT gentoo
LABEL gentoo
    LINUX /vmlinuz
    APPEND root=/dev/sda2
EOF