Freaks City

Effective system administration relies on robust monitoring scripts. This guide explores best practices for implementing service health checks and automated recovery using Bash conditional logic. 1. System Resource Monitoring To monitor system memory and alert administartors, we can leverage the free utility. The following script checks if avai ...

Environment Preparation Establish a stable network baseline before deploying the DNS service. Disable transient security modules and assign static addressing to both the authoritative server and the testing client. # Temporarily disable SELinux and halt the firewall sudo setenforce 0 sudo systemctl stop firewalld # Assign static IPv4 parameter ...

Project Overview This project involves creating a minimal shell implementation in Linux that supports basic file and directory operations. The shell should provide an interactive command-line interface and execute common system commands. Core Functionality Requirements Display command prompt with current directory Process user input commands P ...

While we often use serial ports for information printing in embedded systems, this approach isn't suitable for multi-host network environments. This introduces the concept of network programming. In Linux, network programming involves using sockets for inter-process communication, particularly between processes on different hosts. Sockets provi ...

Understanding Rsync and Inotify Rsync is an efficient file synchronization tool that offers enhanced security, rapid backup capabilities, and support for incremental backups. Traditional backup methods like cp and tar can't match rsync's performance when dealing with large datasets. However, rsync has limitations with massive file collections ...

Arithmetic Operations Script files must begin with #!/bin/bash. Comment are denoted by #. Code should be properly indented with whitespace. Arithmetic operations support: +, -, *, /, **, %. Evaluation methods: # Method 1 let VAR=arithmetic-expression # Method 2 VAR=$[arithmetic-expression] # Method 3 VAR=$((arithmetic-expression)) # Method 4 ...

Application-Level Rate Limiting with TrickleTrickle operates in user-space to govern bandwidth for specific applications by manipulating socket data transmissions. It leverages dynamic linking, meaning it only functions with programs relying on libc.so. Consequently, statically compiled binaries and UDP traffic are unsupported. A distinct advan ...

File System and Disk Management Basics To inspect disk usage on your system, use df -h: df -h To check directory sizes, use du with various options: du -h – display sizes in human-readable format (K, M, G). du -a – show sizes for all files in the directory tree. du -d N – limit depth to N levels. For example, du -h -d 0 ~ shows only the ho ...

Overview of SSDB SSDB is a NoSQL database similar to Redis but designed for disk-based storage rather than in-memory operations. This makes it more cost-effective for applications where high-speed access is not critical. Unlike Redis, which stores all data in RAM, SSDB leverages disk space for persistence, enabling easier scalability at lower i ...

Entroduction Working with remote Linux environments is a common requirement for modern development teams. This guide explains how to configure IntelliJ IDEA for remote server development using SSH, and demonstrates how to establish connections through network boundaries using tunneling software. The appproach allows compilation, building, debug ...