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Screen Quick Reference

Basic

Description	Command
Start a new session with session name	screen -S <session_name>
List running sessions / screens	screen -ls
Attach to a running session	screen -x
Attach to a running session with name	screen -r

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deb http://deb.debian.org/debian bullseye main contrib non-free
deb-src http://deb.debian.org/debian bullseye main contrib non-free

deb http://deb.debian.org/debian bullseye-updates main contrib non-free
deb-src http://deb.debian.org/debian bullseye-updates main contrib non-free

deb http://deb.debian.org/debian bullseye-backports main contrib non-free
deb-src http://deb.debian.org/debian bullseye-backports main contrib non-free

deb http://security.debian.org/debian-security/ bullseye-security main contrib non-free

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Fail2Ban

sudo install fail2ban

UFW

sudo install ufw

UFW Settings

sudu ufw default deny incomoing

sudo ufw default allow outgoins

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# pylint: disable-all
# flake8: noqa

import sys
import socket
import getopt
import threading
import subprocess

listen = command = upload = False

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Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "your_email@youremail.com"

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curl --include \
     --no-buffer \
     --header "Connection: Upgrade" \
     --header "Upgrade: websocket" \
     --header "Host: example.com:80" \
     --header "Origin: http://example.com:80" \
     --header "Sec-WebSocket-Key: SGVsbG8sIHdvcmxkIQ==" \
     --header "Sec-WebSocket-Version: 13" \
     http://example.com:80/

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Write to NTFS support MacOS

1. Get the partition UUID

Connect the external drive to MacOS. It should mount read-only. Start "System Information", clic on Hardware -> Storage, select your drive in the list and copy its UUID.

Another way to get the UUID is to use the diskutil CLI tool:

~$ diskutil list 
~$ distutil info diskXsY

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#!/bin/bash
UP=$(pgrep mysql | wc -l);
if [ "$UP" -ne 1 ];
then
        echo "MySQL is down.";
        sudo service mysql start

else
        echo "All is well.";
fi

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#!/usr/bin/env bash

# print usage
DOMAIN=$1
if [ -z "$1" ]; then
    echo "USAGE: $0 tld"
    echo ""
    echo "This will generate a non-secure self-signed wildcard certificate for "
    echo "a given development tld."
    echo "This should only be used in a development environment."

sproadn

#!/usr/bin/env bash

# print usage
DOMAIN=$1
if [ -z "$1" ]; then 

    echo "USAGE: $0 domain.lan"
    echo ""
    echo "This will generate a non-secure self-signed wildcard certificate for given domain."
    echo "This should only be used in a development environment."