basnijholt

• Download latest Raspbian
• Use Etcher to flash SD-card
• touch ssh in /boot before putting the SD-card in the Raspberry Pi
• find out the IP of Raspberry and ssh into it
• ssh-copy-id and change password
• Setup auto mounting of disk
• ls -l /dev/disk/by-uuid/ and copy the UUID
• Create the folder to mount to sudo mkdir /media/usb && sudo chown -R pi:pi /media/usb
• Permanent mounting with sudo nano /etc/fstab and add this line at bottom: UUID=PUT_THE_UUID_HERE /media/usb ext4 defaults,noatime 0 1
• Install syncthing with:

basnijholt

for i in range(1, 101):
    if i%15 == 0:
        print('FizzBuzz')
    elif i%3 == 0:
        print('Fizz')
    elif i%5 == 0:
        print('Buzz')
    else:
        print(i)

basnijholt

from functools import lru_cache

@lru_cache()
def fib(n):
    if n in [0, 1]:
        return 1
    else:
        return fib(n-1) + fib(n-2)
fib(10)

basnijholt

Setting up seafile on a Raspberry Pi with stretch and an encrypted external drive

Install Raspbian stretch

• download the image here
• put the rasbian stretch image on an SD-card with Etcher
• put a ssh file in the /boot folder by doing: cd /Volumes/boot/ and touch ssh
• connect the Raspberry Pi to your router and ssh into it
• run ssh-copy-id pi@<ip here>
• change password with passwd
• Expand file system, change hostname, set timezone, change Wi-Fi country, and set locale in sudo raspi-config

basnijholt

#/bin/bash

# run this script with:
# nohup ~/Work/install_conda.sh > /dev/null 2>&1 &

export CONDA_DIR="${HOME}/miniconda3"

# Create a temporary folder
mkdir -p ~/tmp && cd ~/tmp

basnijholt

<table border="0" width="300" cellspacing="0" cellpadding="0">
  <tbody>
    <tr>
      <td>
        <table border="0" cellspacing="0" cellpadding="0">
          <tbody>
            <tr>
              <td style="padding: 0 8px 0 0" valign="top" width="100"><img style="width: 100px; border-radius: 10%" src="http://nijholt.biz/stuff/me.png" alt="" width="100" /></td>
              <td style="font-size: 1em; padding: 0 15px 0 8px" valign="top">
                <table style="line-height: 1.4; font-family: Verdana, Geneva, sans-serif; font-size: 70%; color: #000001" border="0" cellspacing="0" cellpadding="0">

basnijholt

nbviewer() { if [ $# -eq 0 ]; then echo -e "No arguments specified. Usage:\necho nbviewer /tmp/test.ipynb\ncat /tmp/test.ipynb | nbviewer test.ipynb"; return 1; fi 
tmpfile=$( mktemp -t transferXXX ); if tty -s; then basefile=$(basename "$1" | sed -e 's/[^a-zA-Z0-9._-]/-/g'); curl --progress-bar --upload-file "$1" "https://transfer.sh/$basefile" >> $tmpfile; else curl --progress-bar --upload-file "-" "https://transfer.sh/$1" >> $tmpfile ; fi; (cat $tmpfile | sed s@https://@https://nbviewer.jupyter.org/urls/@g); rm -f $tmpfile; echo ""; } 

basnijholt

Using ipyparallel on the cluster

One time only

Create a parallel profile

ipython profile create --parallel --profile=slurm

cd into ~/.ipython/profile_slurm/

basnijholt

Create slurm_jupyter.sbatch

#!/bin/bash
#SBATCH --nodes 1
#SBATCH --ntasks-per-node 20
#SBATCH --exclusive
#SBATCH --time 4:00:00
#SBATCH --mem-per-cpu 4000
#SBATCH --job-name jupyter

basnijholt

"""Common functions for doing stuff."""

from copy import copy
from datetime import timedelta
import functools
from glob import glob
from itertools import product
import os
import time
import subprocess