Ubuntu 命令行备份

不定期更新日常用到但记不住的命令。
## 显示操作系统信息
lsb_release -a
# 或
cat /etc/os-release

## 启用BBR
sudo modprobe tcp_bbr
echo "tcp_bbr" | sudo tee --append /etc/modules-load.d/modules.conf
echo "net.core.default_qdisc=fq" | sudo tee --append /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr" | sudo tee --append /etc/sysctl.conf
sudo sysctl -p

## 安装Docker
# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

# Add the repository to Apt sources:
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update

sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

# 添加当前用户到docker用户组（运行docker时不用sudo）
sudo usermod -aG docker $USER
# 刷新
newgrp docker

## 安装certbot
sudo snap install --classic certbot
sudo ln -s /snap/bin/certbot /usr/bin/certbot

# 申请证书
sudo certbot certonly --standalone -d 域名 -m 邮箱 --agree-tos --no-eff-email

## 启用防火墙
sudo ufw enable
sudo ufw allow 22/tcp
sudo ufw allow 443/tcp
sudo ufw allow 80/tcp
sudo reboot
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