jonathanschilling

Installing GrapheneOS on a Pixel 8 Pro (husky)

First try: CLI

prerequisites

• instructions: https://grapheneos.org/install/cli
• using Arch Linux (officially supported by CLI installer method) on a Lenovo W510
• updated device: Settings -> System -> Software updates -> System update -> Check for update -> "Your system is up to date"

enable OEM lunlocking

jonathanschilling

#!/bin/bash

# e.g. $0 xfce4-terminal
echo "setting terminal to open from Nemo to" $@
gsettings set org.cinnamon.desktop.default-applications.terminal exec $@

jonathanschilling

# (some build stuff already installed for kernel update, I think)

sudo apt-get install git cmake libopenmpi-dev libnetcdff-dev libscalapack-openmpi-dev libblas-dev liblapack-dev

git clone https://github.com/ORNL-Fusion/Stellarator-Tools.git

# into setup_cmake:
elif [ $MACHINE_ID == "eqrec0" ] || \
     [ $MACHINE_ID == "eqrec1" ]
then

jonathanschilling

#!/bin/bash

sudo dd if=ubuntu-22.04.3-live-server-amd64.iso of=/dev/sdd bs=1M status=progress oflag=sync

jonathanschilling

#!/bin/bash

# Make Git fetch all remote branches.
# from https://stackoverflow.com/a/25941875

git config --get remote.origin.fetch
# +refs/heads/master:refs/remotes/origin/master
# --> only fetches master !!!

git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*"

jonathanschilling

#!/bin/bash

watch "grep -e Dirty: -e Writeback: /proc/meminfo"

jonathanschilling

If nothing works, try systematic debugging!

Xvnc is the starting place.

The latest docs are here: https://github.com/TigerVNC/tigervnc/blob/master/unix/vncserver/HOWTO.md

Don't put a xstartup file in ~/.vnc; this is deprecated.

Don't have a Xsession file in /etc/X11; this messes things up.

jonathanschilling

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.image as img
import h5py

folder = "/data/jonathan/Projekte/Elektrotechnik/Computerbasteln/Macintosh/MacSE_screencap/screencap/"
#folder = "C:/Users/Jonathan/data/Projekte/Elektrotechnik/Computerbasteln/Macintosh/Macintosh SE/screencap/"

# read HDF5 file
# timebase are equal, since LeCroy 7200A plugins were synced during acquisition

jonathanschilling

Create a working OpenVPN configuration on Arch Linux

Most OpenVPN tunnels only support IPv4. Thus, the system has to be configured such that IPv6 is disabled. Moreover, DNS leaks are still possible and thus, the DNS configuration needs to be adjusted as well.

On Arch, install update-systemd-resolved from AUR (GitHub repo). The following lines then go in the OpenVPN configuration:

script-security 2

jonathanschilling

import mpmath as mp

# default number of digits of precision for calculations
mp.mp.dps = 300

# frequently-used constants with arbitrary precision
zero      = mp.mpf("0")
one       = mp.mpf("1")
two       = mp.mpf("2")