Network Pinger - Ping it

A simple command-line tool to ping a single IP address or a range of IP addresses to check their availability.

Features

• Ping a single IP address.
• Ping a range of IP addresses.
• Display results in a user-friendly format.
• Export data to excel.

Requirements

• Python 3.x
• Required libraries: requirements.txt

Installation

1. Clone the repository:

   git clone https://github.com/cuongitl/pyNetworkPinger.git
   cd pyNetworkPinger

1. Install the required libraries:

   pip install -r requirements.txt

Usage

Quick mode

Ping a Single IP Address

To ping a single IP address, run the following command:

python pingit.py <IP_ADDRESS>

Replace <IP_ADDRESS> with the actual IP address you want to ping.

Ping a Range of IP Addresses

This is a note; I'll write more fully later!

Install NetBox under 10 Minutes or less?

All steps are automated 100% by Python!

1. preparing_data: upload on config files to target host.

2. environment_setup: Installing Docker and Docker-Compose

3. Deploy containers: netbox, nginx, postgresql, redis, rq_worker...

4. Create new createsuperuser (Optional)

Details:

1.Upload config files:

- .env

- docker-compose.yml

- docker_install.sh

- netbox_full_setup.sh

- nsteam.it.crt

- nsteam.it.key

2. Installing Docker and Docker-Compose

- by docker_install.sh

3. Deploy docker containers: netbox, nginx, postgresql, redis, rq_worker...

- by netbox_full_setup.sh

4. Create new createsuperuser (Optional)

- by python code.

#!/bin/bash
:: Filename: docker_install.sh
:: Modified: 2025-05-02
:: Purpose: Quick install Docker on RHEL system.

# Built with ❤️ by Cuongitl (https://infra.lecuong.info)
# Reset color
RESET='\033[0m'

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[0;33m'
BLUE='\033[0;34m'
MAGENTA='\033[0;35m'
CYAN='\033[0;36m'

# Update the system packages
echo -e "${YELLOW}Updating system packages...${RESET}"
sudo dnf update -y || { echo -e "${RED}Error updating system packages. Exiting.${RESET}"; exit 1; }

# Install the necessary packages
echo -e "${YELLOW}Installing necessary packages...${RESET}"
sudo dnf install -y dnf-utils || { echo -e "${RED}Error installing dnf-utils. Exiting.${RESET}"; exit 1; }

# Add the Docker repository
echo -e "${YELLOW}Adding Docker repository...${RESET}"
sudo dnf config-manager --add-repo https://download.docker.com/linux/rhel/docker-ce.repo || { echo -e "${RED}Error adding Docker repository. Exiting.${RESET}"; exit 1; }

# Install Docker
echo -e "${YELLOW}Installing Docker...${RESET}"
sudo dnf install docker-ce docker-ce-cli containerd.io -y || { echo -e "${RED}Error installing Docker. Exiting.${RESET}"; exit 1; }

# Start the Docker service
echo -e "${YELLOW}Starting Docker service...${RESET}"
sudo systemctl start docker || { echo -e "${RED}Error starting Docker service. Exiting.${RESET}"; exit 1; }

# Enable the Docker service to start automatically on system boot
echo -e "${YELLOW}Enabling Docker service to start automatically on system boot...${RESET}"
sudo systemctl enable docker || { echo -e "${RED}Error enabling Docker service. Exiting.${RESET}"; exit 1; }

# Verify the Docker installation
echo -e "${YELLOW}Verifying Docker installation...${RESET}"
sudo docker --version || { echo -e "${RED}Error verifying Docker installation. Exiting.${RESET}"; exit 1; }

# Install Docker Compose
echo -e "${YELLOW}Installing Docker Compose...${RESET}"
sudo curl -L "https://github.com/docker/compose/releases/download/v2.35.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose || { echo -e "${RED}Error downloading Docker Compose. Exiting.${RESET}"; exit 1; }
sudo chmod +x /usr/local/bin/docker-compose || { echo -e "${RED}Error making Docker Compose executable. Exiting.${RESET}"; exit 1; }

# Verify the Docker Compose installation
echo -e "${YELLOW}Verifying Docker Compose installation...${RESET}"
if [ -x "/usr/local/bin/docker-compose" ]; then
    echo -e "${GREEN}Docker Compose installed successfully.${RESET}"
else
    echo -e "${RED}Error verifying Docker Compose installation. Exiting.${RESET}"
    exit 1
fi

# (Optional) Create a symlink for easier access
echo -e "${YELLOW}Creating symlink for Docker Compose...${RESET}"
if [ ! -L "/usr/bin/docker-compose" ]; then
    sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose || { echo -e "${RED}Error creating symlink for Docker Compose. Exiting.${RESET}"; exit 1; }
else
    echo -e "${CYAN}Symlink for Docker Compose already exists. Skipping.${RESET}"
fi

# Verify the Docker Compose version
echo -e "${YELLOW}Verifying Docker Compose version...${RESET}"
docker-compose --version || { echo -e "${RED}Error verifying Docker Compose version. Exiting.${RESET}"; exit 1; }

echo -e

To block a wildcard domain on Windows:

We can use Acrylic DNS Proxy (free and open source). It creates a proxy DNS server on your computer with its own hosts file, which supports wildcards.

1. Download and Install Acrylic DNS Proxy

Download Acrylic DNS Proxy from the official website and install it: https://infra.lecuong.info/acrylic-dns-proxy

2. Edit Network Adapter Settings to Point to Acrylic DNS Proxy (127.0.0.1)

Set the Preferred DNS server to 127.0.0.1

IPv4 or IPv6

By completing this step, your system will route all DNS queries through Acrylic DNS Proxy.

3. Configuring Acrylic DNS Proxy to Block a Wildcard Domain

To block a wildcard domain, such as *.youtube.com, follow these steps:

With so many out there, it can get overwhelming—so let’s break down some of the most common and important ones in simple terms:  

𝗧𝗖𝗣/𝗜𝗣 – The backbone of the internet! TCP ensures data is split into packets and delivered correctly, while IP handles addressing and routing. Without them, the internet wouldn't work as we know it.  

𝗗𝗡𝗦 – Think of this as the internet’s phonebook. It translates domain names (like 𝚐𝚘𝚘𝚐𝚕𝚎.𝚌𝚘𝚖) into IP addresses, so computers know where to connect.  

PowerShell script is to automate the process of copying a file  from a source directory to a destination directory

Purpose of the Script 

The purpose of this PowerShell script is to automate the process of copying a file (abc.xlsx) from a source directory to a destination directory, ensuring that: 

1.  The source file exists before attempting any further actions. 
2. The destination directory exists or is created if it doesn't. 
3. No overwriting of existing files occurs in the destination directory. If a file with the same name already exists, the script appends a numeric counter (-1, -2, etc.) to the filename to ensure that each copied file has a unique name. 
4. Safe file operations are ensured by checking for file existence and automatically generating a unique file name when necessary. 

Main Use Case:

 This script is useful when automating tasks like backing up files, copying reports, logs, or other documents, where the filenames may need to be adjusted based on the date or incremented to avoid conflicts with existing files. 

It ensures that the latest copy of the file is always transferred to the destination directory without any risk of overwriting existing files. 

 In summary, this script is designed to automate the process of file copying, making it safe, efficient, and organized, especially in environments where files with the same name (but potentially different versions) need to be handled daily or periodically.

backupfile.ps1

 How to split an MP3 file into multiple tracks using specified start and end times?

Hôm nay có một bạn học viên hỏi cách cắt một file mp3 ra nhiều file khác nhau với track times cụ thể.
Yêu cầu này cũng thường gặp đối với nhiều người học tiếng Anh hoặc học bất cứ thứ gì từ file mp3, cần cắt ngắn file gốc ra nhiều file nhỏ theo từng bài học.

Vì lười kiếm phần mềm cắt thử  rồi test tới lui các kiểu nên tôi viết nhanh đoạn code thực hiện việc này! 

Dùng Python code như sau:

Configure Zabbix Agent: Active vs. Passive ?

DB_ROOT_PASSWORD='your-password'
DB_PORT='3307'

vim mariadb_install.sh 

Take-note: step by step how to install Zabbix-Server.

Zabbix - Easy Steps for Installation and Configuration:

This is my topo:

Part 01 of  IT Infrastructure Monitoring with Zabbix. In this article:

- server01: Zabbix

- server02: MySQL 

Let's go!

# server01

vim /etc/hosts

172.16.2.201 vnsmysql01.infra.lecuong.info
172.16.2.203 vnszabbix01.infra.lecuong.info

Add the Zabbix Repository:

Zabbix v6

rpm -Uvh https://repo.zabbix.com/zabbix/6.0/rhel/9/x86_64/zabbix-release-latest.el9.noarch.rpm

Zabbix v7

rpm -Uvh https://repo.zabbix.com/zabbix/7.0/rocky/9/x86_64/zabbix-release-latest.el9.noarch.rpm

Install Zabbix Server, Frontend, and Agent: