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BASH Snippets.

Simple HTTP URL Health Check

Perform a quick health check on any HTTP/HTTPS URL using curl in Bash, verifying response status and connectivity for web services.

Generate Strong Random Passwords/Tokens

Generate secure, random passwords or tokens using /dev/urandom and head in Bash, essential for temporary credentials or unique identifiers.

Automate Daily Website/Project Backups

Create a robust bash script to automate backing up website files and, optionally, a database to a timestamped archive, essential for disaster recovery.

Efficiently Deploy Web Project Files with Rsync

Learn to use rsync in a bash script for efficient, incremental file synchronization and deployment of web project files to a remote server over SSH, saving time and bandwidth.

Monitor and Auto-Restart a Critical Web Service

Implement a bash script to periodically check if a critical web service (e.g., a Node.js app, Gunicorn) is running and automatically restart it if it's found to be down.

Extract Specific Configuration Values from Files

A bash script to parse and extract specific key-value pairs from configuration files like .env or INI files, useful for scripting deployment or environment setup.

Batch Git Pull Across Multiple Local Repositories

A convenient bash script to automate `git pull` across several local Git repositories, simplifying updates for multi-project development environments or local server setups.

Automate Git Pull Across Multiple Repositories

Learn how to write a bash script to iterate through a directory of Git repositories and perform a 'git pull' on each, keeping all local branches up-to-date efficiently.

Implement Robust Error Handling and Logging in Bash

Create more reliable bash scripts by incorporating comprehensive error handling with `set -e`, `trap`, and functions for structured logging to stdout and a log file.

Find and Delete Old Files Recursively

Learn to use the `find` command with various options to locate and safely remove files older than a specified number of days from a directory and its subdirectories.

Monitor Disk Usage and Send Email Alerts

Set up a bash script to monitor disk space on critical partitions, sending an email alert when usage exceeds a defined threshold, ensuring proactive system maintenance.

Configure Essential HTTP Security Headers

Enhance web application security by configuring critical HTTP headers like Content-Security-Policy (CSP), HSTS, and X-Frame-Options to mitigate common attacks.