Arch Linux VPS initialize script

arch_init.sh

#!/bin/bash

USERNAME='zeeko'
HOSTNAME='arch'

# pacman Color
sed -i 's/#Color/Color/g' /etc/pacman.conf

# Repo
cat >> /etc/pacman.conf << EOF

[archlinuxcn]
Server = https://cdn.repo.archlinuxcn.org/\$arch
EOF

# Kernel and packages; I prefer lts kernel
pacman -Syyu --noconfirm linux-lts sudo mosh git vim fish htop docker docker-compose nodejs npm v2ray screen tmux rng-tools screenfetch archlinuxcn-keyring
pacman -Rs linux --noconfirm
grub-mkconfig -o /boot/grub/grub.cfg

# hostname
echo $HOSTNAME > /etc/hostname

# Locale: timezone and language
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
echo LANG=en_US.UTF-8 > /etc/locale.conf
sed -i 's/#en_US.UTF-8\ UTF-8/en_US.UTF-8\ UTF-8/g' /etc/locale.gen
sed -i 's/#zh_CN.UTF-8\ UTF-8/zh_CN.UTF-8\ UTF-8/g' /etc/locale.gen
locale-gen

# Optmize tcp
cat > /etc/sysctl.d/tcp_fastopen.conf << EOF
# tcp_fastopen
net.ipv4.tcp_fastopen = 3
EOF

cat > /etc/modules-load.d/tcp_bbr.conf << EOF
tcp_bbr
EOF

cat > /etc/sysctl.d/tcp_bbr.conf << EOF
# tcp_bbr
net.core.default_qdisc = fq
net.ipv4.tcp_congestion_control = bbr
EOF

modprobe tcp_bbr
sysctl --system
# check
sysctl net.ipv4.tcp_available_congestion_control
sysctl net.ipv4.tcp_congestion_control

# User
useradd -mG wheel,docker $USERNAME -s /usr/bin/fish
echo '%wheel ALL=(ALL) NOPASSWD: ALL' > /etc/sudoers.d/wheel
sed -i 's/PermitRootLogin\ yes/PermitRootLogin\ no/g' /etc/ssh/sshd_config

# Entropy
systemctl enable --now rngd.service

# Docker
systemctl enable --now docker.service

# Root fish shell config
chsh -s /usr/bin/fish
mkdir -p /root/.config/fish
cat > /root/.config/fish/config.fish << EOF
function fish_greeting
    echo "You are now ROOT user!"
    echo "With great power, comes great responsibility."
end

alias l="ls"
alias ll="ls -lh"
alias la="ls -Alh"
alias qwq="uname -snrm; uptime"
EOF

# Config for user

# Install fisher
curl https://git.io/fisher --create-dirs -sLo /home/$USERNAME/.config/fish/functions/fisher.fish

# greeting and alias
cat > /home/$USERNAME/.config/fish/config.fish << EOF
set PATH \$HOME/.local/bin \$PATH

function fish_greeting
    uname -snrm; uptime
end

alias l="ls"
alias ll="ls -lh"
alias la="ls -Alh"
alias qwq="uname -snrm; uptime"

# zeeko.fish
alias stls="sudo systemctl start"
alias stlr="sudo systemctl restart"
alias stlR="sudo systemctl daemon-reload"
alias stlp="sudo systemctl stop"
alias stl="sudo systemctl status"
EOF

# npm global path

cat > /home/$USERNAME/.npmrc << EOF
prefix=/home/$USERNAME/.local
EOF

# Config dirs
mkdir -p /home/$USERNAME/.local/bin

chown -R $USERNAME:$USERNAME /home/$USERNAME

screenfetch