Freaks City

Managing Graphical Interfaces in CentOS 6.x In older distributions like CentOS 6, system states are managed via runlevels. Runlevel 3 represents a multi-user command-line environment with networking, while runlevel 5 includes the X Window System for graphical output. Temporary Runlevel Switching To drop from a graphical session to a terminal-on ...

Creating Storage Pools The zpool create command allows creating mirrored configurations using multiple drives: zpool create [pool_name] mirror [device1] [device2] ... Multiple mirror groups can be established by repeating the mirror keyword: [root@server ~]# zpool create -f datapool mirror sdc sdd mirror sde sdf [root@server ~]# zpool status p ...

Infrastructure Overview In this deployement, we utilize three Linux instances to form a resilient multi-master MariaDB cluster. This setup ensures data consistency and high availability across all nodes. Node Hostname IP Address Role galera-01 10.32.161.131 Cluster Node galera-02 10.32.161.132 Cluster Node galeera-03 10.32.161.133 Cl ...

Implementing Real-time File Synchronization with Sersync and Rsync This guide details the implementation of a real-time file synchronization solution using Sersync and Rsync on CentOS systems. This setup allows for automatic synchronizasion of local file modifications to a remote directory, making it ideal for backup solutions and content mirro ...

Overview of Docker Containerization Docker functions as an open-source platform designed for containerization, facilitating the build, test, and deployment processes. Applications are packaged into movable containers that include all necessary dependencies, ensuring consistent execution across different environments. This technology is integral ...

This script gathers essential server metrics, including the hostname, network details, OS version, kernel data, CPU specifications, and memory capacity. It utilizes color codes to improve output readability. #!/bin/bash # Filename: server_status.sh # Define color variables for terminal output COLOR_RESET='\033[0m' COLOR_HEADER='\033[1;36m' COL ...

CPU Utilization Threshold Alert Monitor processor load and trigger a notification when usage exceeds a defined limit. This implementation calculates active CPU time by subtracting the idle percentage reported by top. #!/usr/bin/env bash ALERT_LIMIT=75 CURRENT_LOAD=$(top -bn1 | awk '/^%Cpu/ {print 100 - $8}') if awk "BEGIN {exit !($CURR ...

Real-Time Directory Synchronization In production environments, maintaining consistent file states across multiple servers is critical. A common requirement involves continuously mirroring changes from a primary directory—such as an NFS export—to a designated path on a backup server. Core Synchronization Approach Two widely adopted methods enab ...