bachkukkik

Octave CheatSheet

GNU Octave is a high-level interpreted language, primarily intended for numerical computations.
(via GNU Octave)

Basics

• not equal ~=
• logical AND &&

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Backup Procedure:

Check disk -> unmount disk -> Backup SD Card -> Eject

Clone Procedure:

Check disk -> unmount disk -> Format card -> unmount disk -> Clone SD Card -> Eject

MacOS Command Line

• Check disk diskutil list

• unmount disk sudo diskutil unmountDisk /dev/disk4

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Ref: https://www.makeuseof.com/tag/raspberry-pi-update-raspbian-os/

• Begin by updating the repository package list: sudo apt-get update && sudo apt-get upgrade
• When this is done, run the upgrade command: sudo apt-get dist-upgrade
• Follow any prompts and wait for the Pi to be upgraded. When you’re done, type: sudo apt-get clean
• This will discard any unneeded files that have been downloaded as part of the upgrade. Finish by restarting: sudo reboot

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Confirm Model / OS

• [RPi] Confirm Raspberry Pi Model cat /proc/device-tree/model
• [RPi] Confirm Operating System cat /etc/os-release

Networking commands

• IP scanner sudo nmap -O -sT 192.168.1.0/24
• pi network config

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import concurrent.futures
import time

start = time.perf_counter()

def do_something(seconds):
    print(f'Sleeping {seconds} second(s)...')
    time.sleep(seconds)
    return 'Done Sleeping...'

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import os
from functools import wraps, partial
from inspect import signature
# https://stackoverflow.com/questions/55748500/simulate-the-assignment-of-function-arguments-to-args-and-kwargs

try:
    module = os.path.basename(__file__)
except:
    module = 'some_plain_str'

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#### cat /etc/systemd/system/jupyter_self_restart.service
[Unit]
Description= pi_kk start Jupyter Notebook on system boot

[Service]
Type=simple
PIDFile=/run/jupyter.pid
ExecStart=/home/pi/.local/bin/jupyter-notebook --config=/home/pi/.jupyter/jupyter_notebook_config.py
User=pi
Group=pi

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## if not yet done
## $ jupyter notebook --generate-config
## $ jupyter notebook password
## $ python
## [1] from notebook.auth import passwd
## [2] passwd() # fill in correct password
## [3] exit()
## $ sudo nano ~/.jupyter/jupyter_notebook_config.py

c.NotebookApp.allow_remote_access = True

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#### cat /etc/systemd/system/ngrok_8888_self_restart.service
[Unit]
Description= bachkukkik_xavier start ngork on system boot

[Service]
Type=simple
PIDFile=/run/ngrok_jupyter.pid
ExecStart=/home/<your username>/ngrok http http://localhost:8888
User=<your username>
Group=<your group>

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### !pip install pathos
import multiprocessing
import concurrent.futures
from pathos.multiprocessing import ProcessingPool

workers = int(multiprocessing.cpu_count())

@errors_pusher
def parallel_threading(main_func,
                       lst_args: list,