From f50c2ff925fb389818dcb23a684acc0275821a36 Mon Sep 17 00:00:00 2001
From: Christian Heller <c.heller@plomlompom.de>
Date: Tue, 1 Aug 2023 04:38:32 +0200
Subject: [PATCH] Add first steps for Bookworm setup.

---
 bookworm/apt-mark/all                         |  12 +
 .../apt/apt.conf.d/99_minimize_dependencies   |   4 +
 bookworm/etc_files/all/etc/apt/sources.list   |   4 +
 bookworm/etc_files/all/etc/default/locale     |   1 +
 bookworm/etc_files/all/etc/locale.gen         | 483 ++++++++++++++++++
 bookworm/etc_files/all/etc/timezone           |   1 +
 bookworm/setup_scripts/copy_dirtree.sh        |  30 ++
 bookworm/setup_scripts/install_for_target.sh  |  20 +
 bookworm/setup_scripts/purge_nonrequireds.sh  |  30 ++
 .../setup_scripts/set_hostname_and_fqdn.sh    |  50 ++
 bookworm/setup_scripts/setup.sh               |  40 ++
 bookworm/setup_scripts/setup_desktop.sh       |  27 +
 12 files changed, 702 insertions(+)
 create mode 100644 bookworm/apt-mark/all
 create mode 100644 bookworm/etc_files/all/etc/apt/apt.conf.d/99_minimize_dependencies
 create mode 100644 bookworm/etc_files/all/etc/apt/sources.list
 create mode 100644 bookworm/etc_files/all/etc/default/locale
 create mode 100644 bookworm/etc_files/all/etc/locale.gen
 create mode 100644 bookworm/etc_files/all/etc/timezone
 create mode 100755 bookworm/setup_scripts/copy_dirtree.sh
 create mode 100755 bookworm/setup_scripts/install_for_target.sh
 create mode 100755 bookworm/setup_scripts/purge_nonrequireds.sh
 create mode 100755 bookworm/setup_scripts/set_hostname_and_fqdn.sh
 create mode 100755 bookworm/setup_scripts/setup.sh
 create mode 100755 bookworm/setup_scripts/setup_desktop.sh

diff --git a/bookworm/apt-mark/all b/bookworm/apt-mark/all
new file mode 100644
index 0000000..4b760bc
--- /dev/null
+++ b/bookworm/apt-mark/all
@@ -0,0 +1,12 @@
+# connectivity: ifupdown seems necessary everyhwere, isc-dhcp-client
+# unpredictably so
+ifupdown
+isc-dhcp-client
+# git for the setup directory; cloning works with ca-certificates
+ca-certificates
+git
+# to avoid constant warnings about no locale being found
+locales
+# extremely useful for basic network debugging; missed these more than once in an emergency
+netcat
+iputils-ping
diff --git a/bookworm/etc_files/all/etc/apt/apt.conf.d/99_minimize_dependencies b/bookworm/etc_files/all/etc/apt/apt.conf.d/99_minimize_dependencies
new file mode 100644
index 0000000..4aaef79
--- /dev/null
+++ b/bookworm/etc_files/all/etc/apt/apt.conf.d/99_minimize_dependencies
@@ -0,0 +1,4 @@
+APT::AutoRemove::RecommendsImportant "false";
+APT::AutoRemove::SuggestsImportant "false";
+APT::Install-Recommends "false";
+APT::Install-Suggests "false";
diff --git a/bookworm/etc_files/all/etc/apt/sources.list b/bookworm/etc_files/all/etc/apt/sources.list
new file mode 100644
index 0000000..55b1418
--- /dev/null
+++ b/bookworm/etc_files/all/etc/apt/sources.list
@@ -0,0 +1,4 @@
+deb http://deb.debian.org/debian bullseye main contrib non-free
+deb http://security.debian.org/debian-security bullseye-security main contrib non-free
+deb http://deb.debian.org/debian bullseye-updates main contrib non-free
+deb http://ftp.debian.org/debian bullseye-backports main contrib non-free
diff --git a/bookworm/etc_files/all/etc/default/locale b/bookworm/etc_files/all/etc/default/locale
new file mode 100644
index 0000000..dd6eee3
--- /dev/null
+++ b/bookworm/etc_files/all/etc/default/locale
@@ -0,0 +1 @@
+LANG="en_US.UTF-8"
diff --git a/bookworm/etc_files/all/etc/locale.gen b/bookworm/etc_files/all/etc/locale.gen
new file mode 100644
index 0000000..a28cfa4
--- /dev/null
+++ b/bookworm/etc_files/all/etc/locale.gen
@@ -0,0 +1,483 @@
+# This file lists locales that you wish to have built. You can find a list
+# of valid supported locales at /usr/share/i18n/SUPPORTED, and you can add
+# user defined locales to /usr/local/share/i18n/SUPPORTED. If you change
+# this file, you need to rerun locale-gen.
+
+
+# aa_DJ ISO-8859-1
+# aa_DJ.UTF-8 UTF-8
+# aa_ER UTF-8
+# aa_ER@saaho UTF-8
+# aa_ET UTF-8
+# af_ZA ISO-8859-1
+# af_ZA.UTF-8 UTF-8
+# ak_GH UTF-8
+# am_ET UTF-8
+# an_ES ISO-8859-15
+# an_ES.UTF-8 UTF-8
+# anp_IN UTF-8
+# ar_AE ISO-8859-6
+# ar_AE.UTF-8 UTF-8
+# ar_BH ISO-8859-6
+# ar_BH.UTF-8 UTF-8
+# ar_DZ ISO-8859-6
+# ar_DZ.UTF-8 UTF-8
+# ar_EG ISO-8859-6
+# ar_EG.UTF-8 UTF-8
+# ar_IN UTF-8
+# ar_IQ ISO-8859-6
+# ar_IQ.UTF-8 UTF-8
+# ar_JO ISO-8859-6
+# ar_JO.UTF-8 UTF-8
+# ar_KW ISO-8859-6
+# ar_KW.UTF-8 UTF-8
+# ar_LB ISO-8859-6
+# ar_LB.UTF-8 UTF-8
+# ar_LY ISO-8859-6
+# ar_LY.UTF-8 UTF-8
+# ar_MA ISO-8859-6
+# ar_MA.UTF-8 UTF-8
+# ar_OM ISO-8859-6
+# ar_OM.UTF-8 UTF-8
+# ar_QA ISO-8859-6
+# ar_QA.UTF-8 UTF-8
+# ar_SA ISO-8859-6
+# ar_SA.UTF-8 UTF-8
+# ar_SD ISO-8859-6
+# ar_SD.UTF-8 UTF-8
+# ar_SS UTF-8
+# ar_SY ISO-8859-6
+# ar_SY.UTF-8 UTF-8
+# ar_TN ISO-8859-6
+# ar_TN.UTF-8 UTF-8
+# ar_YE ISO-8859-6
+# ar_YE.UTF-8 UTF-8
+# as_IN UTF-8
+# ast_ES ISO-8859-15
+# ast_ES.UTF-8 UTF-8
+# ayc_PE UTF-8
+# az_AZ UTF-8
+# be_BY CP1251
+# be_BY.UTF-8 UTF-8
+# be_BY@latin UTF-8
+# bem_ZM UTF-8
+# ber_DZ UTF-8
+# ber_MA UTF-8
+# bg_BG CP1251
+# bg_BG.UTF-8 UTF-8
+# bhb_IN.UTF-8 UTF-8
+# bho_IN UTF-8
+# bn_BD UTF-8
+# bn_IN UTF-8
+# bo_CN UTF-8
+# bo_IN UTF-8
+# br_FR ISO-8859-1
+# br_FR.UTF-8 UTF-8
+# br_FR@euro ISO-8859-15
+# brx_IN UTF-8
+# bs_BA ISO-8859-2
+# bs_BA.UTF-8 UTF-8
+# byn_ER UTF-8
+# ca_AD ISO-8859-15
+# ca_AD.UTF-8 UTF-8
+# ca_ES ISO-8859-1
+# ca_ES.UTF-8 UTF-8
+# ca_ES.UTF-8@valencia UTF-8
+# ca_ES@euro ISO-8859-15
+# ca_ES@valencia ISO-8859-15
+# ca_FR ISO-8859-15
+# ca_FR.UTF-8 UTF-8
+# ca_IT ISO-8859-15
+# ca_IT.UTF-8 UTF-8
+# ce_RU UTF-8
+# chr_US UTF-8
+# cmn_TW UTF-8
+# crh_UA UTF-8
+# cs_CZ ISO-8859-2
+# cs_CZ.UTF-8 UTF-8
+# csb_PL UTF-8
+# cv_RU UTF-8
+# cy_GB ISO-8859-14
+# cy_GB.UTF-8 UTF-8
+# da_DK ISO-8859-1
+# da_DK.UTF-8 UTF-8
+# de_AT ISO-8859-1
+# de_AT.UTF-8 UTF-8
+# de_AT@euro ISO-8859-15
+# de_BE ISO-8859-1
+# de_BE.UTF-8 UTF-8
+# de_BE@euro ISO-8859-15
+# de_CH ISO-8859-1
+# de_CH.UTF-8 UTF-8
+# de_DE ISO-8859-1
+# de_DE.UTF-8 UTF-8
+# de_DE@euro ISO-8859-15
+# de_IT ISO-8859-1
+# de_IT.UTF-8 UTF-8
+# de_LI.UTF-8 UTF-8
+# de_LU ISO-8859-1
+# de_LU.UTF-8 UTF-8
+# de_LU@euro ISO-8859-15
+# doi_IN UTF-8
+# dv_MV UTF-8
+# dz_BT UTF-8
+# el_CY ISO-8859-7
+# el_CY.UTF-8 UTF-8
+# el_GR ISO-8859-7
+# el_GR.UTF-8 UTF-8
+# en_AG UTF-8
+# en_AU ISO-8859-1
+# en_AU.UTF-8 UTF-8
+# en_BW ISO-8859-1
+# en_BW.UTF-8 UTF-8
+# en_CA ISO-8859-1
+# en_CA.UTF-8 UTF-8
+# en_DK ISO-8859-1
+# en_DK.ISO-8859-15 ISO-8859-15
+# en_DK.UTF-8 UTF-8
+# en_GB ISO-8859-1
+# en_GB.ISO-8859-15 ISO-8859-15
+# en_GB.UTF-8 UTF-8
+# en_HK ISO-8859-1
+# en_HK.UTF-8 UTF-8
+# en_IE ISO-8859-1
+# en_IE.UTF-8 UTF-8
+# en_IE@euro ISO-8859-15
+# en_IL UTF-8
+# en_IN UTF-8
+# en_NG UTF-8
+# en_NZ ISO-8859-1
+# en_NZ.UTF-8 UTF-8
+# en_PH ISO-8859-1
+# en_PH.UTF-8 UTF-8
+# en_SG ISO-8859-1
+# en_SG.UTF-8 UTF-8
+# en_US ISO-8859-1
+# en_US.ISO-8859-15 ISO-8859-15
+en_US.UTF-8 UTF-8
+# en_ZA ISO-8859-1
+# en_ZA.UTF-8 UTF-8
+# en_ZM UTF-8
+# en_ZW ISO-8859-1
+# en_ZW.UTF-8 UTF-8
+# eo UTF-8
+# es_AR ISO-8859-1
+# es_AR.UTF-8 UTF-8
+# es_BO ISO-8859-1
+# es_BO.UTF-8 UTF-8
+# es_CL ISO-8859-1
+# es_CL.UTF-8 UTF-8
+# es_CO ISO-8859-1
+# es_CO.UTF-8 UTF-8
+# es_CR ISO-8859-1
+# es_CR.UTF-8 UTF-8
+# es_CU UTF-8
+# es_DO ISO-8859-1
+# es_DO.UTF-8 UTF-8
+# es_EC ISO-8859-1
+# es_EC.UTF-8 UTF-8
+# es_ES ISO-8859-1
+# es_ES.UTF-8 UTF-8
+# es_ES@euro ISO-8859-15
+# es_GT ISO-8859-1
+# es_GT.UTF-8 UTF-8
+# es_HN ISO-8859-1
+# es_HN.UTF-8 UTF-8
+# es_MX ISO-8859-1
+# es_MX.UTF-8 UTF-8
+# es_NI ISO-8859-1
+# es_NI.UTF-8 UTF-8
+# es_PA ISO-8859-1
+# es_PA.UTF-8 UTF-8
+# es_PE ISO-8859-1
+# es_PE.UTF-8 UTF-8
+# es_PR ISO-8859-1
+# es_PR.UTF-8 UTF-8
+# es_PY ISO-8859-1
+# es_PY.UTF-8 UTF-8
+# es_SV ISO-8859-1
+# es_SV.UTF-8 UTF-8
+# es_US ISO-8859-1
+# es_US.UTF-8 UTF-8
+# es_UY ISO-8859-1
+# es_UY.UTF-8 UTF-8
+# es_VE ISO-8859-1
+# es_VE.UTF-8 UTF-8
+# et_EE ISO-8859-1
+# et_EE.ISO-8859-15 ISO-8859-15
+# et_EE.UTF-8 UTF-8
+# eu_ES ISO-8859-1
+# eu_ES.UTF-8 UTF-8
+# eu_ES@euro ISO-8859-15
+# eu_FR ISO-8859-1
+# eu_FR.UTF-8 UTF-8
+# eu_FR@euro ISO-8859-15
+# fa_IR UTF-8
+# ff_SN UTF-8
+# fi_FI ISO-8859-1
+# fi_FI.UTF-8 UTF-8
+# fi_FI@euro ISO-8859-15
+# fil_PH UTF-8
+# fo_FO ISO-8859-1
+# fo_FO.UTF-8 UTF-8
+# fr_BE ISO-8859-1
+# fr_BE.UTF-8 UTF-8
+# fr_BE@euro ISO-8859-15
+# fr_CA ISO-8859-1
+# fr_CA.UTF-8 UTF-8
+# fr_CH ISO-8859-1
+# fr_CH.UTF-8 UTF-8
+# fr_FR ISO-8859-1
+# fr_FR.UTF-8 UTF-8
+# fr_FR@euro ISO-8859-15
+# fr_LU ISO-8859-1
+# fr_LU.UTF-8 UTF-8
+# fr_LU@euro ISO-8859-15
+# fur_IT UTF-8
+# fy_DE UTF-8
+# fy_NL UTF-8
+# ga_IE ISO-8859-1
+# ga_IE.UTF-8 UTF-8
+# ga_IE@euro ISO-8859-15
+# gd_GB ISO-8859-15
+# gd_GB.UTF-8 UTF-8
+# gez_ER UTF-8
+# gez_ER@abegede UTF-8
+# gez_ET UTF-8
+# gez_ET@abegede UTF-8
+# gl_ES ISO-8859-1
+# gl_ES.UTF-8 UTF-8
+# gl_ES@euro ISO-8859-15
+# gu_IN UTF-8
+# gv_GB ISO-8859-1
+# gv_GB.UTF-8 UTF-8
+# ha_NG UTF-8
+# hak_TW UTF-8
+# he_IL ISO-8859-8
+# he_IL.UTF-8 UTF-8
+# hi_IN UTF-8
+# hne_IN UTF-8
+# hr_HR ISO-8859-2
+# hr_HR.UTF-8 UTF-8
+# hsb_DE ISO-8859-2
+# hsb_DE.UTF-8 UTF-8
+# ht_HT UTF-8
+# hu_HU ISO-8859-2
+# hu_HU.UTF-8 UTF-8
+# hy_AM UTF-8
+# hy_AM.ARMSCII-8 ARMSCII-8
+# ia_FR UTF-8
+# id_ID ISO-8859-1
+# id_ID.UTF-8 UTF-8
+# ig_NG UTF-8
+# ik_CA UTF-8
+# is_IS ISO-8859-1
+# is_IS.UTF-8 UTF-8
+# it_CH ISO-8859-1
+# it_CH.UTF-8 UTF-8
+# it_IT ISO-8859-1
+# it_IT.UTF-8 UTF-8
+# it_IT@euro ISO-8859-15
+# iu_CA UTF-8
+# ja_JP.EUC-JP EUC-JP
+# ja_JP.UTF-8 UTF-8
+# ka_GE GEORGIAN-PS
+# ka_GE.UTF-8 UTF-8
+# kk_KZ PT154
+# kk_KZ.RK1048 RK1048
+# kk_KZ.UTF-8 UTF-8
+# kl_GL ISO-8859-1
+# kl_GL.UTF-8 UTF-8
+# km_KH UTF-8
+# kn_IN UTF-8
+# ko_KR.EUC-KR EUC-KR
+# ko_KR.UTF-8 UTF-8
+# kok_IN UTF-8
+# ks_IN UTF-8
+# ks_IN@devanagari UTF-8
+# ku_TR ISO-8859-9
+# ku_TR.UTF-8 UTF-8
+# kw_GB ISO-8859-1
+# kw_GB.UTF-8 UTF-8
+# ky_KG UTF-8
+# lb_LU UTF-8
+# lg_UG ISO-8859-10
+# lg_UG.UTF-8 UTF-8
+# li_BE UTF-8
+# li_NL UTF-8
+# lij_IT UTF-8
+# ln_CD UTF-8
+# lo_LA UTF-8
+# lt_LT ISO-8859-13
+# lt_LT.UTF-8 UTF-8
+# lv_LV ISO-8859-13
+# lv_LV.UTF-8 UTF-8
+# lzh_TW UTF-8
+# mag_IN UTF-8
+# mai_IN UTF-8
+# mg_MG ISO-8859-15
+# mg_MG.UTF-8 UTF-8
+# mhr_RU UTF-8
+# mi_NZ ISO-8859-13
+# mi_NZ.UTF-8 UTF-8
+# mk_MK ISO-8859-5
+# mk_MK.UTF-8 UTF-8
+# ml_IN UTF-8
+# mn_MN UTF-8
+# mni_IN UTF-8
+# mr_IN UTF-8
+# ms_MY ISO-8859-1
+# ms_MY.UTF-8 UTF-8
+# mt_MT ISO-8859-3
+# mt_MT.UTF-8 UTF-8
+# my_MM UTF-8
+# nan_TW UTF-8
+# nan_TW@latin UTF-8
+# nb_NO ISO-8859-1
+# nb_NO.UTF-8 UTF-8
+# nds_DE UTF-8
+# nds_NL UTF-8
+# ne_NP UTF-8
+# nhn_MX UTF-8
+# niu_NU UTF-8
+# niu_NZ UTF-8
+# nl_AW UTF-8
+# nl_BE ISO-8859-1
+# nl_BE.UTF-8 UTF-8
+# nl_BE@euro ISO-8859-15
+# nl_NL ISO-8859-1
+# nl_NL.UTF-8 UTF-8
+# nl_NL@euro ISO-8859-15
+# nn_NO ISO-8859-1
+# nn_NO.UTF-8 UTF-8
+# nr_ZA UTF-8
+# nso_ZA UTF-8
+# oc_FR ISO-8859-1
+# oc_FR.UTF-8 UTF-8
+# om_ET UTF-8
+# om_KE ISO-8859-1
+# om_KE.UTF-8 UTF-8
+# or_IN UTF-8
+# os_RU UTF-8
+# pa_IN UTF-8
+# pa_PK UTF-8
+# pap_AW UTF-8
+# pap_CW UTF-8
+# pl_PL ISO-8859-2
+# pl_PL.UTF-8 UTF-8
+# ps_AF UTF-8
+# pt_BR ISO-8859-1
+# pt_BR.UTF-8 UTF-8
+# pt_PT ISO-8859-1
+# pt_PT.UTF-8 UTF-8
+# pt_PT@euro ISO-8859-15
+# quz_PE UTF-8
+# raj_IN UTF-8
+# ro_RO ISO-8859-2
+# ro_RO.UTF-8 UTF-8
+# ru_RU ISO-8859-5
+# ru_RU.CP1251 CP1251
+# ru_RU.KOI8-R KOI8-R
+# ru_RU.UTF-8 UTF-8
+# ru_UA KOI8-U
+# ru_UA.UTF-8 UTF-8
+# rw_RW UTF-8
+# sa_IN UTF-8
+# sat_IN UTF-8
+# sc_IT UTF-8
+# sd_IN UTF-8
+# sd_IN@devanagari UTF-8
+# se_NO UTF-8
+# sgs_LT UTF-8
+# shs_CA UTF-8
+# si_LK UTF-8
+# sid_ET UTF-8
+# sk_SK ISO-8859-2
+# sk_SK.UTF-8 UTF-8
+# sl_SI ISO-8859-2
+# sl_SI.UTF-8 UTF-8
+# so_DJ ISO-8859-1
+# so_DJ.UTF-8 UTF-8
+# so_ET UTF-8
+# so_KE ISO-8859-1
+# so_KE.UTF-8 UTF-8
+# so_SO ISO-8859-1
+# so_SO.UTF-8 UTF-8
+# sq_AL ISO-8859-1
+# sq_AL.UTF-8 UTF-8
+# sq_MK UTF-8
+# sr_ME UTF-8
+# sr_RS UTF-8
+# sr_RS@latin UTF-8
+# ss_ZA UTF-8
+# st_ZA ISO-8859-1
+# st_ZA.UTF-8 UTF-8
+# sv_FI ISO-8859-1
+# sv_FI.UTF-8 UTF-8
+# sv_FI@euro ISO-8859-15
+# sv_SE ISO-8859-1
+# sv_SE.ISO-8859-15 ISO-8859-15
+# sv_SE.UTF-8 UTF-8
+# sw_KE UTF-8
+# sw_TZ UTF-8
+# szl_PL UTF-8
+# ta_IN UTF-8
+# ta_LK UTF-8
+# tcy_IN.UTF-8 UTF-8
+# te_IN UTF-8
+# tg_TJ KOI8-T
+# tg_TJ.UTF-8 UTF-8
+# th_TH TIS-620
+# th_TH.UTF-8 UTF-8
+# the_NP UTF-8
+# ti_ER UTF-8
+# ti_ET UTF-8
+# tig_ER UTF-8
+# tk_TM UTF-8
+# tl_PH ISO-8859-1
+# tl_PH.UTF-8 UTF-8
+# tn_ZA UTF-8
+# tr_CY ISO-8859-9
+# tr_CY.UTF-8 UTF-8
+# tr_TR ISO-8859-9
+# tr_TR.UTF-8 UTF-8
+# ts_ZA UTF-8
+# tt_RU UTF-8
+# tt_RU@iqtelif UTF-8
+# ug_CN UTF-8
+# uk_UA KOI8-U
+# uk_UA.UTF-8 UTF-8
+# unm_US UTF-8
+# ur_IN UTF-8
+# ur_PK UTF-8
+# uz_UZ ISO-8859-1
+# uz_UZ.UTF-8 UTF-8
+# uz_UZ@cyrillic UTF-8
+# ve_ZA UTF-8
+# vi_VN UTF-8
+# wa_BE ISO-8859-1
+# wa_BE.UTF-8 UTF-8
+# wa_BE@euro ISO-8859-15
+# wae_CH UTF-8
+# wal_ET UTF-8
+# wo_SN UTF-8
+# xh_ZA ISO-8859-1
+# xh_ZA.UTF-8 UTF-8
+# yi_US CP1255
+# yi_US.UTF-8 UTF-8
+# yo_NG UTF-8
+# yue_HK UTF-8
+# zh_CN GB2312
+# zh_CN.GB18030 GB18030
+# zh_CN.GBK GBK
+# zh_CN.UTF-8 UTF-8
+# zh_HK BIG5-HKSCS
+# zh_HK.UTF-8 UTF-8
+# zh_SG GB2312
+# zh_SG.GBK GBK
+# zh_SG.UTF-8 UTF-8
+# zh_TW BIG5
+# zh_TW.EUC-TW EUC-TW
+# zh_TW.UTF-8 UTF-8
+# zu_ZA ISO-8859-1
+# zu_ZA.UTF-8 UTF-8
diff --git a/bookworm/etc_files/all/etc/timezone b/bookworm/etc_files/all/etc/timezone
new file mode 100644
index 0000000..94d5acc
--- /dev/null
+++ b/bookworm/etc_files/all/etc/timezone
@@ -0,0 +1 @@
+Europe/Berlin
diff --git a/bookworm/setup_scripts/copy_dirtree.sh b/bookworm/setup_scripts/copy_dirtree.sh
new file mode 100755
index 0000000..c0cb9bf
--- /dev/null
+++ b/bookworm/setup_scripts/copy_dirtree.sh
@@ -0,0 +1,30 @@
+#!/bin/sh
+# Copy files in argument-selected subdirectories of $1 to subdirectories
+# of $2 (which may be an empty string), e.g. with $1 of "etc_files", $2
+# of "" and $3 of "all", copy files below etc_files/all such as
+# etc_files/all/etc/foo/bar to equivalent locations below / such as
+# /etc/foo/bar. Create directories as necessary. Multiple arguments after
+# $3 are possible.
+#
+# CAUTION: This removes original files at the affected paths.
+set -e
+
+if [ "$#" -lt 3 ]; then
+    echo 'Need arguments: source root, target root, modules.'
+    false
+fi
+source_root="$1"
+target_root="$2"
+shift 2
+
+for target_module in "$@"; do
+    mkdir -p "${source_root}/${target_module}"
+    cd "${source_root}/${target_module}"
+    for path in $(find . -type f); do
+        target_path="${target_root}"$(echo "${path}" | cut -c2-)
+        source_path=$(realpath "${path}")
+        dir=$(dirname "${target_path}")
+        mkdir -p "${dir}"
+        cp "${source_path}" "${target_path}"
+    done
+done
diff --git a/bookworm/setup_scripts/install_for_target.sh b/bookworm/setup_scripts/install_for_target.sh
new file mode 100755
index 0000000..6f42b56
--- /dev/null
+++ b/bookworm/setup_scripts/install_for_target.sh
@@ -0,0 +1,20 @@
+#!/bin/sh
+# Walks through the package names in the argument-selected files of
+# apt-mark/ and ensures the respective packages are installed.
+#
+# Ignores anything in an apt-mark/ file after the last newline.
+set -e
+
+config_tree_prefix="${HOME}/config/bullseye"
+aptmark_dir="${config_tree_prefix}/apt-mark"
+
+for target in "$@"; do
+    path="${aptmark_dir}/${target}"
+    # TODO: continue if file at $path not found, to get rid of dummy files
+    cat "${path}" | while read line; do
+        echo "$line"
+        if [ ! $(echo "${line}" | cut -c1) = "#" ]; then
+            DEBIAN_FRONTEND=noninteractive apt-get -y -o Dpkg::Options::=--force-confold install "${line}"
+        fi
+    done
+done
diff --git a/bookworm/setup_scripts/purge_nonrequireds.sh b/bookworm/setup_scripts/purge_nonrequireds.sh
new file mode 100755
index 0000000..135196b
--- /dev/null
+++ b/bookworm/setup_scripts/purge_nonrequireds.sh
@@ -0,0 +1,30 @@
+#!/bin/sh
+# This script removes all Debian packages that are not of Priority
+# "required" or not depended on by packages of priority "required"
+# or not listed in the argument-selected files of apt-mark/.
+set -e
+
+config_tree_prefix="${HOME}/config/bullseye"
+aptmark_dir="${config_tree_prefix}/apt-mark"
+
+dpkg-query -Wf '${Package} ${Priority}\n' | grep ' required' | sed 's/ required//' > /tmp/list_white_unsorted
+for target in "$@"; do
+    path="${aptmark_dir}/${target}"
+    cat "${path}" | while read line; do
+        if [ ! $(echo "${line}" | cut -c1) = "#" ]; then
+            echo "${line}" >> /tmp/list_white_unsorted
+        fi
+    done
+done
+sort /tmp/list_white_unsorted > /tmp/list_white
+dpkg-query -Wf '${Package}\n' > /tmp/list_all_packages
+sort /tmp/list_all_packages > /tmp/foo
+mv /tmp/foo /tmp/list_all_packages
+comm -3 /tmp/list_all_packages /tmp/list_white > /tmp/list_black
+apt-mark auto `cat /tmp/list_black`
+DEBIAN_FRONTEND=noninteractive apt-get -y --purge autoremove
+rm /tmp/list_all_packages /tmp/list_white_unsorted /tmp/list_white /tmp/list_black
+
+# Somehow, auto-mounts get undone by all of this, so re-mount /etc/fstab.
+# TODO: Find out why.
+mount -a
diff --git a/bookworm/setup_scripts/set_hostname_and_fqdn.sh b/bookworm/setup_scripts/set_hostname_and_fqdn.sh
new file mode 100755
index 0000000..a3b9f9a
--- /dev/null
+++ b/bookworm/setup_scripts/set_hostname_and_fqdn.sh
@@ -0,0 +1,50 @@
+#!/bin/sh
+# Sets hostname and optionally FQDN.
+#
+# Calls hostname, writes to /etc/hostname and /etc/hosts. For /etc/hosts
+# writing follows recommendations from Debian manual at
+# <https://www.debian.org/doc/manuals/debian-reference/ch05.en.html>
+# (section "The hostname resolution") on how to map hostname and possibly
+# FQDN to a permanent IP if present (we assume here any non-private IP
+# and non-loopback IP returned by hostname -I to fulfill that criterion
+# on our systems) or to 127.0.1.1 if not. On the reasoning for separating
+# localhost and hostname mapping to different IPs, see
+# <https://unix.stackexchange.com/a/13087>.
+#
+# Ignores IPv6s.
+set -e
+
+hostname="$1"
+fqdn="$2"
+if [ "${hostname}" = "" ]; then
+    echo "Need hostname as argument."
+    false
+fi
+echo "${hostname}" > /etc/hostname
+hostname "${hostname}"
+
+final_ip="127.0.1.1"
+for ip in $(hostname -I); do
+    if [ $(echo "${ip}" | grep ':' | wc -l) -eq 1 ]; then
+        continue
+    fi
+    range_1=$(echo "${ip}" | cut -d "." -f 1)
+    range_2=$(echo "${ip}" | cut -d "." -f 2)
+    if [ "${range_1}" -eq 127 ]; then
+        continue
+    elif [ "${range_1}" -eq 10 ]; then
+        continue
+    elif [ "${range_1}" -eq 172 ]; then
+        if [ "${range_2}" -ge 16 ] && [ "${range_2}" -le 31 ]; then
+            continue
+        fi
+    elif [ "${range_1}" -eq 192 ]; then
+        if [ "${range_2}" -eq 168 ]; then
+            continue
+        fi
+    fi
+    final_ip="${ip}"
+done
+
+echo "127.0.0.1 localhost.localdomain localhost" > /etc/hosts
+echo "${final_ip} ${fqdn} ${hostname}" >> /etc/hosts
diff --git a/bookworm/setup_scripts/setup.sh b/bookworm/setup_scripts/setup.sh
new file mode 100755
index 0000000..815683e
--- /dev/null
+++ b/bookworm/setup_scripts/setup.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+set -e
+debian_version="bookworm"
+
+# Provide maximum input for set_hostname_and_fqdn.sh.
+if [ "$#" -lt 2 ]; then
+    echo 'Need at least two arguments (hostname, FQDN).'
+    false
+fi
+hostname="$1"
+fqdn="$2"
+shift 2
+
+config_tree_prefix="${HOME}/config/${debian_version}"
+setup_scripts_dir="${config_tree_prefix}/setup_scripts"
+cd "${setup_scripts_dir}"
+
+# Adapt /etc/ to our needs by copying from ./etc_files. This will set
+# basic configurations affecting following steps, such as setup of APT
+# and the locale selection, so needs to be right at the beginning.
+./copy_dirtree.sh "${config_tree_prefix}/etc_files" "" all "$@"
+
+# Set hostname and FQDN.
+./set_hostname_and_fqdn.sh "${hostname}" "${fqdn}"
+
+# Ensure package installation state as defined by what packages are
+# defined as required by Debian policy and by settings in ./apt-mark/.
+apt update
+./install_for_target.sh all "$@"
+./purge_nonrequireds.sh all "$@"
+
+# Ensure our desired locale is available.
+locale-gen
+
+# Only upgrade after reducing the system to the desired minimum, so that
+# we don't need to get more data than necessary.
+apt -y dist-upgrade
+
+# Set Berlin localtime.
+ln -sf /usr/share/zoneinfo/Europe/Berlin /etc/localtime
diff --git a/bookworm/setup_scripts/setup_desktop.sh b/bookworm/setup_scripts/setup_desktop.sh
new file mode 100755
index 0000000..f265697
--- /dev/null
+++ b/bookworm/setup_scripts/setup_desktop.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+set -e
+debian_version="bookworm"
+legal_system_names="x220 w530"
+
+if [ "$#" -ne 1 ]; then
+    echo 'Need exactly one argument (system name).'
+    false
+fi
+found=0
+for system_name_i in $legal_system_names; do
+    if [ "$1" = "$system_name_i" ]; then
+        found=1
+        system_name="${system_name_i}"
+        continue	
+    fi
+done
+if [ "$found" = 0 ]; then
+    echo "Need legal system name."
+    false
+fi
+
+# Set up system without user environment.
+config_tree_prefix="${HOME}/config/${debian_version}"
+setup_scripts_dir="${config_tree_prefix}/setup_scripts"
+cd "${setup_scripts_dir}"
+./setup.sh "${system_name}" "" user desktop thinkpad "${system_name}"
-- 
2.30.2