Reference on Manzolo Code Notes

Git

Fri, 26 Sep 2025 10:00:00 +0100

Git and Gitflow Guide

Introduction

Git is a distributed version control system that enables multiple developers to collaborate on projects efficiently. Gitflow is a popular branching model that organizes Git branches for streamlined development and release management. This guide covers essential Git commands, introduces the Gitflow workflow, and provides practical examples for managing code repositories.

What is Git?

Git tracks changes to files, allowing multiple users to work on the same project without conflicts. It supports branching, merging, and version history, making it ideal for software development and collaborative projects.

Linux Sysadmin Commands Guide

Fri, 26 Sep 2025 10:00:00 +0100

Linux Sysadmin Commands Guide

Introduction

As a Linux system administrator, mastering essential commands is crucial for managing servers, monitoring systems, and troubleshooting issues. This guide covers fundamental Linux commands for system administration, focusing on user management, process control, network diagnostics, and system monitoring, with practical examples.

Prerequisites

A Linux system (e.g., Ubuntu, CentOS, or Debian).
Root or sudo privileges.
Basic familiarity with the terminal.

System Information

Hardware and System Overview

# Display system information
uname -a

# Show CPU details
lscpu
cat /proc/cpuinfo

# Display memory usage
free -h
cat /proc/meminfo

# List block devices (disks)
lsblk
fdisk -l # Requires sudo

# Show mounted filesystems
df -h

System Uptime and Load

# Display system uptime and load average
uptime

# Show load average
cat /proc/loadavg

# Interactive system monitoring
top
htop # If installed

User and Group Management

Managing Users

# Add a new user
sudo useradd -m -s /bin/bash username

# Set a password for the user
sudo passwd username

# Modify user details
sudo usermod -aG groupname username # Add user to a group
sudo usermod -s /bin/zsh username # Change shell

# Delete a user
sudo userdel -r username # Remove user and home directory

Managing Groups

# Create a new group
sudo groupadd groupname

# Add user to a group
sudo usermod -aG groupname username

# List groups
getent group

# Delete a group
sudo groupdel groupname

Example: Creating a User with Specific Permissions

Create a user devuser with sudo privileges:

Essential Bash Commands - File Management and System Analysis

Thu, 25 Sep 2025 10:00:00 +0100

Learn fundamental Bash commands for file management and system analysis that every developer should know