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BASH Snippets.

Batch Rename Files with a Specific Pattern

Automate the renaming of multiple files in a directory using Bash. This script allows you to add prefixes, suffixes, or replace substrings in filenames.

Extract Unique IPs and Request Counts from Access Logs

Analyze web server access logs using Bash to identify unique visitor IP addresses, count their requests, and gain insights into traffic patterns and potential security issues.

Manage a Local Node.js Development Server

A Bash script to easily start and stop a Node.js development server (e.g., Express, React app) using its process ID, streamlining local development workflows.

Automate Git Pull for Multiple Repositories

Streamline your development workflow by automating 'git pull' across all your Git repositories within a specified directory to keep them up-to-date.

Simple Website and Database Backup Script

Create a robust bash script for scheduled backups of your website files and MySQL or PostgreSQL databases, ensuring data safety and quick recovery.

Parse and Extract Data from JSON API Responses with curl and jq

Leverage `curl` to fetch JSON data from a web API and use `jq` to efficiently parse and extract specific fields for command-line scripting and automation.

Monitor Disk Space and Send Email Alerts

Implement a critical server monitoring script that checks disk space usage and dispatches email alerts to administrators when thresholds are surpassed.

Automate Nginx Configuration Reload on Changes

Automatically validate and reload your Nginx configuration files when changes are detected, ensuring your web server always runs with the latest settings.

Robust Command-Line Argument Parsing with getopts

Learn how to parse command-line options and arguments robustly in Bash scripts using the built-in `getopts` command for better script usability and flexibility, handling flags and values.

Securely Download and Verify File Integrity with Bash

Ensure the integrity and authenticity of downloaded files in Bash by fetching them securely with `curl` over HTTPS and verifying their SHA256 checksum against a known, trusted value.

Implement Retry with Exponential Backoff in Bash

Build a robust retry mechanism with exponential backoff in Bash scripts, ideal for handling transient network failures or unavailable services when executing critical commands or API calls.

Manage Background Processes and Log Output in Bash

Learn to run long-running commands in the background of your Bash scripts, effectively track their Process ID (PID), and redirect their standard output and error streams to specific log files.