Journal of my recent activities

Automatic change of linux configuration files

sed -i 's/#Port 22/Port 123/' /etc/ssh/sshd_config


Dictionary of values with choices for select.

from enum import Enum

class ResourceType(Enum):
    HTML = 0
    VIDEO = 1
    AUDIO = 2
    IMAGE = 3
    PDF = 4
    HTTP = 5
    EPUB = 6

def get_choices():
    return [(r.value, for r in ResourceType]

Creating unit tests for Flask.

import unittest

from app import create_app, db
from config_tests import Config

class MmTestCase(unittest.TestCase):
    def setUp(self): = create_app(Config)
        self.appctx =
        self.client =

    def tearDown(self):
        self.appctx.pop() = None
        self.appctx = None
        self.client = None

How to Write Unit Tests in Python, Part 3: Web Applications

Downloading backups from remote hosts

rsync -av --delete -e 'ssh -p 223' user@host:/dir1 local_dir

#soft #linux

Symetric ant anti-symetric wave function

Google Sheets: Bulk delete

Tools > Script ediotr Set a breakpoint at console log sheet name and Debug.

function DeleteAllSheets() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  console.log("Doc: " + ss.getName());
  var sheets = ss.getSheets();
  for (i = 0; i < sheets.length; i++) {
    switch(sheets[i].getSheetName()) {
      case "21-01":  
        console.log("Delete: " + sheets[i].getSheetName());


Convert ssh2 public key to openssh format

If the pub key is in the format


then you can convert it with

ssh-keygen -i -f >> ~/.ssh/authorized_keys

#soft #linux

Backup SD Card in Fedora

  1. Insert card
  2. Check the /dev label (fdisk -l; lsblk, df)
  3. Unmount: umount /dev/sdb1 (do not use Nautilius eject button)
  4. Backup: dd bs=4M if=/dev/sdb of=nextcloud210313.img