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Reinstall your VPS to minimal Debian
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Debian Network Reinstall Script

Introduction

This script is written to reinstall a VPS/virtual machine to Debian 10 Buster.

Should Work On

Virtualization Platform

  • SolusVM/OpenStack/DigitalOcean/Vultr/Linode/Proxmox/QEMU KVM (BIOS boot)
  • Oracle Cloud Infrastructure (with --force-efi-extra-removable; UEFI boot)
  • Google Cloud Compute Engine (with manually configured VPC internal IP and gateway; UEFI boot)
  • AWS EC2 & Lightsail (BIOS boot)
  • Hyper-V & Azure (Generation 1 BIOS boot & Generation 2 UEFI boot)

Original OS

  • Debian 8/9/10
  • Ubuntu 14.04/16.04/18.04/20.04
  • CentOS 7/8

How It Works

  1. Generate a preseed file to automate installation
  2. Download the 'Debian-Installer' to the /boot directory
  3. Append a menu entry of the installer to the GRUB2 configuration file

Basic Usage

Run the script and then reboot.

By default, an admin user debian with sudo privilege will be created during the installation. Use --user root if you prefer.

curl -fLO https://raw.githubusercontent.com/bohanyang/debi/master/debi.sh && sudo sh debi.sh <OPTIONS>

To revert all changes, run

sudo rm -rf debi.sh /etc/default/grub.d/zz-debi.cfg /boot/debian-* && { sudo update-grub || sudo grub2-mkconfig -o /boot/grub2/grub.cfg; }

Available Options

  • --ip <string> Disable the auto network config (DHCP) and configure a static IP address, e.g. 10.0.0.2, 1.2.3.4/24, 2001:2345:6789:abcd::ef/48
  • --netmask <string> e.g. 255.255.255.0, ffff:ffff:ffff:ffff::
  • --gateway <string> e.g. 10.0.0.1
  • --dns '8.8.8.8 8.8.4.4'
  • --hostname <string> FQDN hostname (includes the domain name), e.g. server1.example.com
  • --network-console Enable the network console of the installer. ssh installer@ip to connect
  • --suite buster
  • --mirror-protocol http or https or ftp
  • --https alias to --mirror-protocol https
  • --mirror-host deb.debian.org
  • --mirror-directory /debian
  • --security-repository http://security.debian.org/debian-security Magic value: 'mirror' = <mirror-protocol>://<mirror-host>/<mirror-directory>/../debian-security
  • --no-account-setup, --no-user (Manual installation) Proceed account setup manually in VNC or remote console.
  • --username, --user debian New user with sudo privilege or root
  • --password <string> Password of the new user. You'll be prompted if you choose to not specify it here
  • --authorized-keys-url <string> URL to your authorized keys for SSH authentication. e.g. https://github.com/torvalds.keys
  • --sudo-with-password Require password when the user invokes sudo command
  • --timezone UTC https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List
  • --ntp 0.debian.pool.ntp.org
  • --no-disk-partitioning, --no-part (Manual installation) Proceed disk partitioning manually in VNC or remote console
  • --disk <string> Manually select a disk for installation. Please remember to specify this when more than one disk is available! e.g. /dev/sda
  • --no-force-gpt By default, GPT rather than MBR partition table will be created. This option disables it.
  • --bios Don't create EFI system partition. If GPT is being used, create a BIOS boot partition (bios_grub partition). Default if /sys/firmware/efi is absent. See
  • --efi Create an EFI system partition. Default if /sys/firmware/efi exists
  • --filesystem ext4
  • --kernel <string> Choose an package for the kernel image
  • --cloud-kernel Choose linux-image-cloud-amd64 as the kernel image
  • --no-install-recommends
  • --install 'ca-certificates libpam-systemd'
  • --safe-upgrade (Default) apt upgrade --with-new-pkgs. See
  • --full-upgrade apt dist-upgrade
  • --no-upgrade
  • --eth Disable Consistent Network Device Naming to get interface names like ethX back
  • --bbr Enable TCP BBR congestion control
  • --hold Don't reboot or power off after installation
  • --power-off Power off after installation rather than reboot
  • --architecture <string> e.g. amd64, i386, arm64, armhf, etc.
  • --boot-directory <string>
  • --firmware Load additional non-free firmwares
  • --force-efi-extra-removable See. Useful on Oracle Cloud
  • --grub-timeout 5 How many seconds the GRUB menu shows before entering the installer
  • --dry-run Print generated preseed and GRUB entry without downloading the installer and actually saving them

Presets

--cdn

  • --mirror-protocol https
  • --mirror-host deb.debian.org
  • --security-repository mirror

--aws

  • --mirror-protocol https
  • --mirror-host cdn-aws.deb.debian.org
  • --security-repository mirror

--china

  • --dns '223.5.5.5 223.6.6.6'
  • --mirror-protocol https
  • --mirror-host mirrors.aliyun.com
  • --security-repository mirror
  • --ntp ntp.aliyun.com