MorningLightMountain713

#!/usr/bin/env python3
#
# Building a tar file chunk-by-chunk.
#
# This is a quick bit of sample code for streaming data to a tar file,
# building it piece-by-piece. The tarfile is built on-the-fly and streamed
# back out. This is useful for web applications that need to dynamically
# build a tar file without swamping the server.
import os
import sys

MorningLightMountain713

import sys 
import dbus

bus = dbus.SystemBus()
systemd = bus.get_object('org.freedesktop.systemd1', '/org/freedesktop/systemd1')
manager = dbus.Interface(systemd, 'org.freedesktop.systemd1.Manager')

def disable_and_stop(service):
    """
    disable_and_stop and stop method will check if the service is already running or not in system.

MorningLightMountain713

This is a TL;DR for: https://linuxopsys.com/topics/update-firmware-on-ubuntu-using-fwupd

# Install
su -
apt update
apt install udisks2 fwupd

# Display supported devices 
fwupdmgr get-devices

MorningLightMountain713

import os
import pwd

file_path = '/tmp/example'
if not os.path.exists(file_path):
  os.makedirs(file_path) # creates with default perms 0777
  uid, gid =  pwd.getpwnam('root').pw_uid, pwd.getpwnam('www-data').pw_uid
  os.chown(file_path, uid, gid) # set user:group as root:www-data
  
# go check with ls -lah /tmp/example 

MorningLightMountain713

Setting up ssh public key authentication on macOS using a YubiKey 4

I largely followed Florin's blog post, but have a few notes to add regarding issues I encountered:

Basic setup notes

1. I used a YubiKey 4, while the blog describes using a YubiKey NEO. I'm sure a YubiKey 5 would also work. I'm also running macOS 10.13.6.
2. I installed GPGTools as recommended. However, as I'll note later, it seems that gpg-agent only automatically starts when gpg is used; for ssh, you'll need to ensure it's running.
3. Before generating your keys, decide what key size you want to use. If you run the list command inside gpg --edit-card, look for the Key attributes line to see what is currently selected. On my YubiKey 4, it defaulted to 2048 bits for all keys:

Key attributes ...: rsa2048 rsa2048 rsa2048

MorningLightMountain713

from socket import socket, AF_PACKET, SOCK_RAW

ETH_P_ALL = 0x0003

print("Starting")

interface = "enx7cc2c65485c0"
# interface_mac = 7c:c2:c6:54:85:c0

# Note: When sending ethernet frames, only the following data is actually supplied at this level: