Nicolas Casajus ahasverus

Setting up OpenVPN under Unix

This tutorial shows the installation and configuration of OpenVPN on both macOS and Ubuntu.

1. Preamble (macOS only)

The easiest way to install OpenVPN on macOS is by using the package manager for macOS Homebrew. But first, you need to install the Xcode Command Line Tools for macOS.

PostgreSQL Command Lines

$ brew install postgresql                                     # Install PostgreSQL

$ /usr/local/opt/postgres/bin/createuser -s postgres          # Create postgres role
$ psql -U postgres                                            # Connect to PostgreSQL
postgres=# \password postgres                                 # Set/change password for postgres

$ brew services start postgresql # Start PostgreSQL server

Setup Ubuntu 22.04 on Lenovo X1 Carbon 7th Gen

SYSTEM SECURITY

Update System

Tips for Kobo Reader

Use the software Calibre to manager and transfer epubs.

Add Book Cover on Screensaver

On a PC:

nano .kobo/affiliate.conf

orthomap <- function(lon, lat) {
  g <- as_s2_geography(TRUE)
  co <- s2_data_countries()
  oc <- s2_difference(g, s2_union_agg(co)) # oceans
  co <- s2_difference(co, s2_union_agg(oc)) # land
  
  # visible half
  b <- s2_buffer_cells(as_s2_geography(paste0("POINT(", lon, " ", lat,")")),
                       distance = 9800000)

	## General Options ----

	options(prompt = "> ", continue = "... ", width = 80, scipen = 100, warn = 0,
	editor = "Atom", tab.width = 2)


	## Graphical Device Dimensions ----

	grDevices::quartz.options(width = 6, height = 6)

	#!/bin/sh

	# chmod a+x ./macos-settings.sh
	# sh ./macos-settings.sh



	## [.] Install Command Line Tools ----

	sudo xcode-select --install

	### [.] ALWAYS OPEN CHROMIUM IN PRIVATE MODE
	###-----------------------------------------

	# N.B. \| First install { AdBlock }, { Adblock Plus } and { Adblock for Youtube } extensions and
	# \| Allow them to be run in private mode

	$ defaults write org.chromium.Chromium IncognitoModeAvailability -integer 2 # / 0
	$ defaults write com.brave.Browser IncognitoModeAvailability -integer 2

	## Switch to Admin

	su -



	## Remove GRUB Menu

	cd /etc/default
	cp grub grub-OLD

	# code from https://gist.github.com/d-qn/4f1c4ed80a4fd6a76cd1153c89f56134

	library(tidyverse)
	library(sf)
	library(osmdata) # to get openstreetmap geo data

	# settings
	# olivier: get data on Montpellier
	bb <- getbb('Montpellier, France') # define the bbox, will be used to fetch OSM data within that box
	dest_proj <- 2056