diff --git a/script/check/README.md b/script/check/README.md
new file mode 100644
index 0000000..65fe47e
--- /dev/null
+++ b/script/check/README.md
@@ -0,0 +1,4 @@
+runAllChecks.sh
+===============
+
+This script processes all checks of a host to verify the right configuration.
diff --git a/script/check/host/all/app_docker-compose_is_installed.check.sh b/script/check/host/all/app_docker-compose_is_installed.check.sh
new file mode 100755
index 0000000..fe8ac50
--- /dev/null
+++ b/script/check/host/all/app_docker-compose_is_installed.check.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+_CURRENT_APP='docker compose version'
+
+${_CURRENT_APP} > /dev/null 2>&1 \
+    && exit 0
+exit 1
diff --git a/script/check/host/all/app_docker_is_installed.check.sh b/script/check/host/all/app_docker_is_installed.check.sh
new file mode 100755
index 0000000..28c5f94
--- /dev/null
+++ b/script/check/host/all/app_docker_is_installed.check.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+docker --version > /dev/null 2>&1 \
+    && exit 0
+exit 1
diff --git a/script/check/host/all/app_nginx_is_installed.check.sh b/script/check/host/all/app_nginx_is_installed.check.sh
new file mode 100755
index 0000000..3ab5370
--- /dev/null
+++ b/script/check/host/all/app_nginx_is_installed.check.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+nginx -v > /dev/null 2>&1 \
+    && exit 0
+exit 1
diff --git a/script/check/host/all/app_nginx_starts_reliable.check.sh b/script/check/host/all/app_nginx_starts_reliable.check.sh
new file mode 100755
index 0000000..83498a8
--- /dev/null
+++ b/script/check/host/all/app_nginx_starts_reliable.check.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# Fail because of unnecessary custom config
+grep "Wants=network-online.target" /lib/systemd/system/nginx.service > /dev/null 2>&1 \
+    && [ -f "/etc/systemd/system/nginx.service" ] \
+    && exit 1
+
+# Success if system config is ok
+grep "Wants=network-online.target" /lib/systemd/system/nginx.service > /dev/null 2>&1 \
+    && exit 0
+
+# Success if custom config fixes system config
+grep "Wants=network-online.target" /etc/systemd/system/nginx.service > /dev/null 2>&1 \
+    && exit 0
+
+exit 1
diff --git a/script/check/host/all/core_cron_starts_setup_as_fallback.check.sh b/script/check/host/all/core_cron_starts_setup_as_fallback.check.sh
new file mode 100755
index 0000000..32ef863
--- /dev/null
+++ b/script/check/host/all/core_cron_starts_setup_as_fallback.check.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+[ "$(id -u)" != "0" ] \
+    && printf "(INSUFFICENT RIGHTS) " \
+    && exit 1
+
+crontab -l | grep -E "[0-9]{1,2}[ \*]{8}[[:blank:]]*\/cis\/setupCoreOntoThisHost.sh" > /dev/null 2>&1 \
+    && exit 0
+exit 1
diff --git a/script/check/host/all/core_git_app_is_installed.check.sh b/script/check/host/all/core_git_app_is_installed.check.sh
new file mode 100755
index 0000000..bf8339d
--- /dev/null
+++ b/script/check/host/all/core_git_app_is_installed.check.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+git --version > /dev/null 2>&1 \
+    && exit 0
+exit 1
diff --git a/script/check/host/all/core_hostname_is_long.check.sh b/script/check/host/all/core_hostname_is_long.check.sh
new file mode 100755
index 0000000..d2ee709
--- /dev/null
+++ b/script/check/host/all/core_hostname_is_long.check.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+_CURRENT_FILE='/etc/hostname'
+
+#The file must be readable, then
+#the number of lines containing a '.' must be zero.
+[ -r "${_CURRENT_FILE}" ] \
+    && [ "$(grep -cF '.' "${_CURRENT_FILE}")" -gt 0 ] \
+    && exit 0
+exit 1
diff --git a/script/check/host/all/core_ssh_app_is_installed.check.sh b/script/check/host/all/core_ssh_app_is_installed.check.sh
new file mode 100755
index 0000000..7a810e1
--- /dev/null
+++ b/script/check/host/all/core_ssh_app_is_installed.check.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+ssh -V > /dev/null 2>&1 \
+    && exit 0
+exit 1
diff --git a/script/check/host/all/core_ssh_authorized_keys_of_jenkins_points_to_definitions.check.sh b/script/check/host/all/core_ssh_authorized_keys_of_jenkins_points_to_definitions.check.sh
new file mode 100755
index 0000000..bc6618e
--- /dev/null
+++ b/script/check/host/all/core_ssh_authorized_keys_of_jenkins_points_to_definitions.check.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+_CURRENT_FILE='/home/jenkins/.ssh/authorized_keys'
+
+[ "$(id -u)" != "0" ] \
+    && printf "(INSUFFICENT RIGHTS) " \
+    && exit 1
+
+#File has to be readable, then
+#search for '/definitions/' in the path of current file, after readlink expanded a potential symlink.
+[ -r "${_CURRENT_FILE}" ] \
+    && readlink -f "${_CURRENT_FILE}" | grep -q "/definitions/" \
+    && exit 0
+
+exit 1
diff --git a/script/check/host/all/core_ssh_authorized_keys_of_root_is_empty_or_points_to_definitions.check.sh b/script/check/host/all/core_ssh_authorized_keys_of_root_is_empty_or_points_to_definitions.check.sh
new file mode 100755
index 0000000..99dbc59
--- /dev/null
+++ b/script/check/host/all/core_ssh_authorized_keys_of_root_is_empty_or_points_to_definitions.check.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+
+_CURRENT_FILE='/root/.ssh/authorized_keys'
+
+[ "$(id -u)" != "0" ] \
+    && printf "(INSUFFICENT RIGHTS) " \
+    && exit 1
+
+#No file is ok
+[ ! -e "${_CURRENT_FILE}" ] \
+    && exit 0
+
+#The file must be readable, then
+#all comments and all blank lines are removed, after which the number of remaining lines must be zero.
+[ -r "${_CURRENT_FILE}" ] \
+    && [ "0" == "$(cat "${_CURRENT_FILE}" | sed 's/[[:blank:]]*#.*//' | sed '/^$/d' | grep -c .)" ] \
+    && exit 0
+
+#File has to be readable, then
+#search for '/definitions/' in the path of current file, after readlink expanded a potential symlink.
+[ -r "${_CURRENT_FILE}" ] \
+    && readlink -f "${_CURRENT_FILE}" | grep -q "/definitions/" \
+    && exit 0
+
+exit 1
diff --git a/script/check/host/all/core_ssh_key_of_root_exists_as_expected.check.sh b/script/check/host/all/core_ssh_key_of_root_exists_as_expected.check.sh
new file mode 100755
index 0000000..c42dfd5
--- /dev/null
+++ b/script/check/host/all/core_ssh_key_of_root_exists_as_expected.check.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+_CURRENT_FILE='/root/.ssh/id_ed25519'
+
+[ "$(id -u)" != "0" ] \
+    && printf "(INSUFFICENT RIGHTS) " \
+    && exit 1
+
+#File has to be readable and no passphrase should be needed.
+ssh-keygen -y -P "" -f "${_CURRENT_FILE}" &> /dev/null \
+    && exit 0
+
+exit 1
diff --git a/script/check/host/all/core_sudoers_file_of_jenkins_points_to_definitions.check.sh b/script/check/host/all/core_sudoers_file_of_jenkins_points_to_definitions.check.sh
new file mode 100755
index 0000000..5e0e97e
--- /dev/null
+++ b/script/check/host/all/core_sudoers_file_of_jenkins_points_to_definitions.check.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+_CURRENT_FILE='/etc/sudoers.d/allow-jenkins-updateRepositories'
+
+[ "$(id -u)" != "0" ] \
+    && printf "(INSUFFICENT RIGHTS) " \
+    && exit 1
+
+#File has to be readable, then
+#search for '/definitions/' in the path of current file, after readlink expanded a potential symlink.
+[ -r "${_CURRENT_FILE}" ] \
+    && readlink -f "${_CURRENT_FILE}" | grep -q "/definitions/" \
+    && exit 0
+
+exit 1
diff --git a/script/check/host/all/core_user_jenkins_exists.check.sh b/script/check/host/all/core_user_jenkins_exists.check.sh
new file mode 100755
index 0000000..38a255d
--- /dev/null
+++ b/script/check/host/all/core_user_jenkins_exists.check.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+_CURRENT_USER='jenkins'
+
+[ "$(id -u)" != "0" ] \
+    && printf "(INSUFFICENT RIGHTS) " \
+    && exit 1
+
+id -u "${_CURRENT_USER}" > /dev/null 2>&1 \
+    && exit 0
+
+exit 1
diff --git a/script/check/host/all/system_localtime_contains_cet_and_cest.check.sh b/script/check/host/all/system_localtime_contains_cet_and_cest.check.sh
new file mode 100755
index 0000000..2db8c02
--- /dev/null
+++ b/script/check/host/all/system_localtime_contains_cet_and_cest.check.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+_CURRENT_FILE='/etc/localtime'
+
+#The file must be readable, then
+#the number of lines containing "CET" must be greater than zero, and
+#the number of lines containing "CEST" must also be greater than zero.
+[ -r "${_CURRENT_FILE}" ] \
+    && [ "$(zdump -v "${_CURRENT_FILE}" | head -n 10 | grep 'CET' | grep -c .)" -gt "0" ] \
+    && [ "$(zdump -v "${_CURRENT_FILE}" | head -n 10 | grep 'CEST' | grep -c .)" -gt "0" ] \
+    && exit 0
+exit 1
diff --git a/script/check/host/all/system_timezone_is_berlin.check.sh b/script/check/host/all/system_timezone_is_berlin.check.sh
new file mode 100755
index 0000000..f50a315
--- /dev/null
+++ b/script/check/host/all/system_timezone_is_berlin.check.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+_CURRENT_FILE='/etc/timezone'
+
+#The file must be readable, then
+#the number of lines containing "Europe/Berlin" must be one.
+[ -r "${_CURRENT_FILE}" ] \
+    && [ "1" == "$(cat "${_CURRENT_FILE}" | grep 'Europe/Berlin' | grep -c .)" ] \
+    && exit 0
+exit 1
diff --git a/script/check/host/all/system_unattended_upgrades_are_disabled.check.sh b/script/check/host/all/system_unattended_upgrades_are_disabled.check.sh
new file mode 100755
index 0000000..e05d3c2
--- /dev/null
+++ b/script/check/host/all/system_unattended_upgrades_are_disabled.check.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+! systemctl is-enabled unattended-upgrades.service > /dev/null 2>&1 \
+    && exit 0
+exit 1
diff --git a/script/check/host/all/system_zfs_app_is_installed.check.sh b/script/check/host/all/system_zfs_app_is_installed.check.sh
new file mode 100755
index 0000000..ec01989
--- /dev/null
+++ b/script/check/host/all/system_zfs_app_is_installed.check.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+zfs --version > /dev/null 2>&1 \
+    && exit 0
+exit 1
diff --git a/script/check/host/all/system_zfs_atime_of_rootfs_zpool1.check.sh b/script/check/host/all/system_zfs_atime_of_rootfs_zpool1.check.sh
new file mode 100755
index 0000000..54c4fd4
--- /dev/null
+++ b/script/check/host/all/system_zfs_atime_of_rootfs_zpool1.check.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+_CURRENT_POOL='zpool1'
+
+#Check if the tool 'zfs' is available, then
+#retrieve the property 'atime' from 'zpool1', without header and compare the result with 'off'
+#because this the feature 'atime' logs each access, there are many avoidable writes.
+
+#Set with: 'zfs set atime=off zpool1'
+zfs version &> /dev/null  \
+    && [ "$(zfs get atime -Ho value ${_CURRENT_POOL} 2> /dev/null)" == "off" ] \
+    && exit 0
+exit 1
diff --git a/script/check/host/all/system_zfs_compression_of_rootfs_zpool1.check.sh b/script/check/host/all/system_zfs_compression_of_rootfs_zpool1.check.sh
new file mode 100755
index 0000000..6a368e4
--- /dev/null
+++ b/script/check/host/all/system_zfs_compression_of_rootfs_zpool1.check.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+_CURRENT_POOL='zpool1'
+
+#Check if the tool 'zfs' is available, then
+#retrieve the property 'compression' from 'zpool1', without header and compare the result with 'lz4'
+
+#Set with: 'zfs set compression=lz4 zpool1'
+zfs version &> /dev/null  \
+    && [ "$(zfs get compression -Ho value ${_CURRENT_POOL} 2> /dev/null)" == "lz4" ] \
+    && exit 0
+exit 1
diff --git a/script/check/host/all/system_zfs_mountpoint_of_rootfs_zpool1.check.sh b/script/check/host/all/system_zfs_mountpoint_of_rootfs_zpool1.check.sh
new file mode 100755
index 0000000..666a949
--- /dev/null
+++ b/script/check/host/all/system_zfs_mountpoint_of_rootfs_zpool1.check.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+_CURRENT_ZFS='zpool1'
+
+#Check if the tool 'zfs' is available, then
+#retrieve the property 'mountpoint' from 'zpool1', without header and compare the result with '/zpool1'
+
+#Set with: 'zfs set mountpount=default'
+zfs version &> /dev/null \
+    && [ "$(zfs get mountpoint -Ho value ${_CURRENT_ZFS} 2> /dev/null)" == "/${_CURRENT_ZFS}" ] \
+    && exit 0
+exit 1
diff --git a/script/check/host/all/system_zpool_alignment_of_pool.check.sh b/script/check/host/all/system_zpool_alignment_of_pool.check.sh
new file mode 100755
index 0000000..2bc7e67
--- /dev/null
+++ b/script/check/host/all/system_zpool_alignment_of_pool.check.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+_CURRENT_POOL='zpool1'
+
+#Check if the tool 'zpool' is available, then
+#retrieve the property 'ashift' from 'zpool1', without header and compare the result with '12'
+zpool version &> /dev/null \
+    && [ "$(zpool get ashift -Ho value ${_CURRENT_POOL} 2> /dev/null)" == "12" ] \
+    && exit 0
+exit 1
diff --git a/script/check/runAllChecks.sh b/script/check/runAllChecks.sh
new file mode 100755
index 0000000..246dd9f
--- /dev/null
+++ b/script/check/runAllChecks.sh
@@ -0,0 +1,59 @@
+#!/bin/bash
+
+_SCRIPT="$(readlink -f "${0}" 2> /dev/null)"
+
+# Folders always ends with an tailing '/'
+_CIS_ROOT="${_SCRIPT%%/script/check/*}/"               #Removes longest  matching pattern '/script/check/*' from the end
+_SCRIPT_PATH="${_CIS_ROOT:?"Missing CIS_ROOT"}script/"
+_OWN_DOMAIN="$(${_CIS_ROOT}core/printOwnDomain.sh)"
+_OWN_DEFINITIONS="${_CIS_ROOT}definitions/${_OWN_DOMAIN:?"Missing OWN_DOMAIN"}/"
+
+
+
+function run_as_root() {
+    [ "0" == "$(id -u)" ] \
+        && echo OK \
+        && return 0
+
+    echo FAIL
+    return 1
+}
+
+function scripts_are_updateable_by_git() {
+        git -C "${_SCRIPT_PATH:?"Missing SCRIPT_PATH"}" pull > /dev/null 2>&1 \
+        && echo OK \
+        && return 0
+
+    echo FAIL
+    return 1
+}
+
+function allChecks() {
+    local _CHECK_PATH _MODE_PATH
+    _CHECK_PATH="${1:?"allChecks(): Missing first parameter CHECK_PATH"}check/"
+    _MODE_PATH="${2:-all}/"
+    readonly _CHECK_PATH _MODE_PATH
+
+    echo "  - ${_CHECK_PATH}host/${_MODE_PATH}*.check.sh"
+    [ "$(ls -1 ${_CHECK_PATH}host/${_MODE_PATH}*.check.sh 2> /dev/null | grep -cE '.*')" == "0"  ] \
+       && echo "  nothing to do" \
+       && return 0
+
+    for _CURRENT_CHECK in ${_CHECK_PATH}host/${_MODE_PATH}*.check.sh; do
+        _NAME="$(basename ${_CURRENT_CHECK} | cut -d'.' -f1)"
+        _CONTEXT="$(echo ${_NAME} | cut -d'_' -f1)"
+        _CHECK="$(echo ${_NAME} | cut -d'_' -f2- | tr '_' ' ')"
+        _RESULT="$("${_CURRENT_CHECK}" && echo OK || echo FAIL)"
+        echo "  ${_CONTEXT^^} ${_CHECK}: ${_RESULT}"
+    done
+}
+
+echo "PRECONDITION run as root: $(run_as_root)"
+echo "PRECONDITION scripts are updateable by git: $(scripts_are_updateable_by_git)"
+echo
+echo "Check all (common):"
+allChecks "${_SCRIPT_PATH}"
+echo "Check all (own):"
+allChecks "${_OWN_DEFINITIONS}"
+echo "Check this host:"
+allChecks "${_OWN_DEFINITIONS}" "$(hostname -s)"