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BASH Snippets.

Parse and Extract Data from Log Files using Regex

Utilize a bash script to parse log files, extracting specific data patterns like IP addresses, timestamps, or error codes using regular expressions with `grep` and `awk`.

Monitor Web Server Error Logs in Real-time

A bash script to continuously monitor Apache or Nginx error logs, displaying new error entries as they occur. Essential for quick identification and debugging of issues on a live web server.

Set Up New Web Project Directory with Correct Permissions

Automate the creation of a new web project directory, ensuring proper ownership and read/write permissions for web server access and secure development workflows.

Check Server Disk Space and Alert if Low

A bash script to monitor available disk space on a server. It checks all mounted filesystems and alerts if usage exceeds a configurable threshold, preventing outages from full disks.

Extract Unique Domain Names from a List of URLs

A powerful bash one-liner to parse a file containing URLs and extract only the unique domain names. Ideal for analyzing web server access logs, link lists, or creating whitelists/blacklists.

Gracefully Restart a Web Service and Check Status

A robust bash script to gracefully restart common web services (e.g., Nginx, Apache, PHP-FPM) and verify their running status, minimizing downtime during deployments or configuration changes.

Automate Git Pull and Web Project Update

A bash script to automate pulling latest Git changes, installing Node.js dependencies, and building a web project for efficient updates and deployments.

Backup a Directory with Timestamp and Cleanup Old Backups

Create timestamped tar.gz backups of a directory and automatically delete backups older than a configurable number of days, saving disk space.

Managing Temporary Files and Directories

Securely create and manage temporary files or directories in Bash scripts, ensuring proper cleanup on exit for clean and robust automation.

Robust File Existence and Permission Checks

Implement robust file existence and permission checks in Bash scripts using conditional expressions to ensure script reliability and prevent errors.

Processing Text Data with awk for Columnar Output

Process and reformat text or log files column-wise using 'awk' in Bash, extracting specific fields and manipulating data efficiently for reports or parsing.

Downloading Files Conditionally with curl (If-Modified-Since)

Download files from a URL in Bash using 'curl', conditionally updating only if the remote file is newer, optimizing bandwidth and speeding up deployments.