Arch Linux Initialization

arch_init.sh

#!/bin/bash

USERNAME='zeeko'
HOSTNAME='hostodo'
SS_PORTNO='2333'
SS_METHOD='aes-256-gcm'
SS_PASSWD='password'

# 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 wget yarn  \
htop docker docker-compose nodejs npm shadowsocks-libev simple-obfs screenfetch \
archlinuxcn-keyring screen
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/modules-load.d/modules.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

systemd_service() {
    systemctl start $1
    systemctl enable $1
}


# Docker
systemd_service docker.service

# shadowsocks-libev-server
mkdir /etc/shadowsocks
cat > /etc/shadowsocks/config.json << EOF
{
    "server": "0.0.0.0",
    "server_port": ${SS_PORTNO},
    "method": "${SS_METHOD}",
    "password": "${SS_PASSWD}",
    "plugin": "obfs-server",
    "plugin_opts": "obfs=tls"
}
EOF
systemd_service shadowsocks-libev-server@config.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 -Alh"
alias qwq="uname -snrm; uptime"
EOF

# Config for user

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

# greeting and alias
cat > /home/$USERNAME/.config/fish/config.fish << EOF
function fish_greeting
    uname -snrm; uptime
end
set -gx PATH \$PATH \$HOME/.local/bin
alias l="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

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

user_dir() {
    mkdir -p $1
    chown -R $USERNAME:$USERNAME $1
}

user_dir /home/$USERNAME/.local
user_dir /home/$USERNAME/.config

screenfetch