Server related scripts

do-what-i-want.sh

#!/usr/bin/env sh

[ $(id -u) -eq 0 ] || sh_c=sudo

do_it() {

#if [ ! $(id -u) -eq 0 ]; then
#  echo Sorry but I require root privileges.
#  exit -1
#fi

set -x

$sh_c apt update

which curl || $sh_c apt install -y curl

curl -fsSL https://get.docker.com | $sh_c sh
$sh_c apt-get install docker-compose-plugin
[ ! $(id -u) -eq 0 ] && $sh_c usermod -aG docker $USER

$sh_c sh -c 'echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf'
$sh_c sh -c 'echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf'
$sh_c sh -c 'echo "net.ipv4.tcp_fastopen = 3" >> /etc/sysctl.conf'
$sh_c sh -c 'echo "fs.file-max = 2097152" >> /etc/sysctl.conf'
# $sh_c echo 'echo 3 > /proc/sys/net/ipv4/tcp_fastopen' >> /etc/rc.local

$sh_c sysctl -p

}

do_it

ubuntu-add-ci-user.sh

#!/usr/bin/env sh

set -xe

sudo adduser --disabled-password --gecos "" ci
sudo usermod -aG docker ci
sudo -H -u ci sh -s << 'EOF'
  set -xe
  mkdir -p ~/.ssh
  cd ~/.ssh
  ssh-keygen -t ed25519 -f id_ed25519 -q -N ""
  cat id_ed25519.pub | tee -a authorized_keys
  cat id_ed25519
EOF

ubuntu-enable-bbr.sh

#!/usr/bin/env sh

# Usage: sudo ./ubuntu-enable-bbr.sh

echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf

sysctl -p

ubuntu-get-docker-ce.sh

#!/usr/bin/env bash

# !!! This script requires root privileges !!!
#
# Usage:
#   # ./ubuntu-get-docker-ce.sh
# or
#   $ sudo ./ubuntu-get-docker-ce.sh

if [ ! $(id -u) -eq 0 ]; then
    echo Sorry but this script requires root privileges.
    exit -1
fi

apt-get update

apt-get install -y \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg-agent \
    software-properties-common

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -

apt-key fingerprint 0EBFCD88

add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

apt-get update

apt-get install -y docker-ce docker-ce-cli containerd.io

curl -L "https://github.com/docker/compose/releases/download/1.24.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose

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