csarn

Reddit post (Archived)

Table of Content

• What to expect?
  • Some TLDR about the idea behind
• Prerequisites
  • Hardware
  • System & Software
• Update: Attention for MUXless laptop

csarn

Usage

on system that should be backed up

• put "restrict_commands.sh" in /usr/local/bin and make it executable
• install ts, lzop and optionally mbuffer

useradd zfsbackup --create-home --system
mkdir /home/zfsbackup/.ssh
zfs allow -u zfsbackup send,hold tank/dataset
echo 'restrict,command="restrict_commands.sh" ssh-ed25519 ...' > /home/zfsbackup/.ssh/authorized_keys

csarn

# Locale / Keymap
d-i debian-installer/locale                   string en_US.UTF-8
d-i debian-installer/keymap                   select de-latin1
d-i console-keymaps-at/keymap                 select de
d-i keyboard-configuration/xkb-keymap         select nodeadkeys
d-i languagechooser/language-name-fb          select German
d-i countrychooser/country-name               select Germany
d-i console-setup/layoutcode                  string de_DE
# Netzwerk-Konfiguration
d-i netcfg/dhcp_timeout                       string 30

csarn

# solution to https://technology.jana.com/2016/04/26/challenge-your-python-knowledge/
# puzzle 4, in the original version (with the typo)
# replacing __repr__ without typing double underscores
# selected deque, because it has a method (pop) that
# 1) has no arguments
# 2) modifies the object
# 3) can return a string

from ctypes import *
from collections import deque