Moving NOP Linux install directives to documentation

content/en/docs/cluster/nop-linux.md

@@ -10,4 +10,131 @@ When benchmarking software it is important to have reproducible results between
 
 We recommend tuning the Linux OS on all linux measurement machines that you have in your cluster to get the highest reproducability out of your measurement runs.
 
-For a detailed description on how to produce your own NOP Linux instance visit [our blog article on NOP Linux](https://www.green-coding.io/blog/nop-linux/).
+The following script configures an Ubuntu 22.04+ system to have no active timers running, remove all unneeded services and disable also
+NTP.
+
+The goal is to keep the system still very close to a production / user setup, but remove invariances from the system without 
+decreasing idle power draw and skewing results.
+
+Please further note that you must execute certain service still periodically. The [client.py](https://github.com/green-coding-solutions/green-metrics-tool/blob/main/cron/client.py) cluster service will periodically run [a cleanup script](https://github.com/green-coding-solutions/green-metrics-tool/blob/main/tools/cluster/cleanup_original.py)
+
+```bash
+#!/bin/bash
+set -euox pipefail
+
+# this is a patch. Firefox seems to have a trick to remove read-only filesystem. We need to unmount that first
+sudo umount /var/snap/firefox/common/host-hunspell || true
+
+# remov all snaps first as they mount read only filesystem that only snap itself can find and unmount
+for i in {1..3}; do # we do this three times as packages depends on one another
+    for snap_pkg in $(snap list | awk 'NR>1 {print $1}'); do sudo snap remove --purge "$snap_pkg"; done
+done
+
+
+# Remove all the packages we don't need
+sudo apt purge -y --purge snapd cloud-guest-utils cloud-init apport apport-symptoms cryptsetup cryptsetup-bin cryptsetup-initramfs curl gdisk lxd-installer mdadm open-iscsi snapd squashfs-tools ssh-import-id wget xauth unattended-upgrades update-notifier-common python3-update-manager unattended-upgrades needrestart command-not-found cron lxd-agent-loader modemmanager motd-news-config pastebinit packagekit
+sudo systemctl daemon-reload
+sudo apt autoremove -y --purge
+
+# Get newest versions of everything
+sudo apt update
+
+sudo apt install psmisc -y
+
+# on some versions killall might be missing. Please insta
+sudo killall unattended-upgrade-shutdown
+
+sudo apt upgrade -y
+
+# These are packages that are installed through the update
+sudo apt remove -y --purge networkd-dispatcher multipath-tools
+
+sudo apt autoremove -y --purge
+
+# These are user running services
+systemctl --user disable --now snap.firmware-updater.firmware-notifier.timer
+systemctl --user disable --now launchpadlib-cache-clean.timer
+systemctl --user disable --now snap.snapd-desktop-integration.snapd-desktop-integration.service
+
+
+# Disable services that might do things
+sudo systemctl disable --now apt-daily-upgrade.timer
+sudo systemctl disable --now apt-daily.timer
+sudo systemctl disable --now dpkg-db-backup.timer
+sudo systemctl disable --now e2scrub_all.timer
+sudo systemctl disable --now fstrim.timer
+sudo systemctl disable --now motd-news.timer
+sudo systemctl disable --now e2scrub_reap.service
+sudo systemctl disable --now tinyproxy.service
+sudo systemctl disable --now  anacron.timer
+
+
+# these following timers might be missing on newer ubuntus
+sudo systemctl disable --now systemd-tmpfiles-clean.timer
+sudo systemctl disable --now fwupd-refresh.timer
+sudo systemctl disable --now logrotate.timer
+sudo systemctl disable --now ua-timer.timer
+sudo systemctl disable --now man-db.timer
+
+sudo systemctl disable --now sysstat-collect.timer
+sudo systemctl disable --now sysstat-summary.timer
+
+sudo systemctl disable --now systemd-journal-flush.service
+sudo systemctl disable --now systemd-timesyncd.service
+
+sudo systemctl disable --now systemd-fsckd.socket
+sudo systemctl disable --now systemd-initctl.socket
+
+sudo systemctl disable --now cryptsetup.target
+
+sudo systemctl disable --now power-profiles-daemon.service
+sudo systemctl disable --now thermald.service
+sudo systemctl disable --now anacron.service
+
+
+
+# Packages to install for editing and later bluetooth. some of us prefer nano, some vim :)
+sudo apt install -y vim nano bluez
+
+# Setup networking
+NET_NAME=$(sudo networkctl list "en*" --no-legend | cut -f 4 -d " ")
+cat <<EOT | sudo tee /etc/systemd/network/en.network
+[Match]
+Name=$NET_NAME
+
+[Network]
+DHCP=ipv4
+EOT
+
+# Disable NTP
+sudo timedatectl set-ntp false
+
+# Disable the kernel watchdogs
+echo 0 | sudo tee /proc/sys/kernel/soft_watchdog
+echo 0 | sudo tee /proc/sys/kernel/nmi_watchdog
+echo 0 | sudo tee /proc/sys/kernel/watchdog
+echo 0 | sudo tee /proc/sys/kernel/watchdog_thresh
+
+# Removes the large header when logging in
+sudo rm /etc/update-motd.d/*
+
+# Remove all cron files. Cron shouldn't be running anyway but just to be safe
+rm -R /etc/cron*
+
+sudo apt autoremove -y --purge
+
+# Desktop systems have NetworkManager. Here we want to disable the periodic check to Host: connectivity-check.ubuntu.com.
+if [ -f "/etc/NetworkManager/NetworkManager.conf" ]; then
+    echo "[connectivity]" >> /etc/NetworkManager/NetworkManager.conf
+    echo "uri=" >> /etc/NetworkManager/NetworkManager.conf
+    echo "interval=0" >> /etc/NetworkManager/NetworkManager.conf
+else
+    echo "NetworkManager configuration file seems not to exist. Probably non desktop system"
+fi
+
+# List all timers and services to validate we have nothing left
+sudo systemctl list timers
+systemctl --user list-timers
+
+echo "All done. Please reboot system!"
+```