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 (manually set the VPC internal --ip, --netmask, --gateway; UEFI boot)
• AWS EC2 & Lightsail (BIOS boot)
• Hyper-V but not 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

Usage

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

Run the script and then reboot. To revert all changes, run

sudo rm -rf debi.sh /etc/default/grub.d/zz-debi.cfg /boot/debian-* && { sudo update-grub || 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
• --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
• --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-partition Should be used if /boot directory is mounted from a dedicated partition like a LVM setup
• --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