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BASH Snippets.

Deploying Static Website via rsync with Exclusions and Dry Run

Automate static website deployments with 'rsync', using powerful features like file exclusions, deletion of old files, and a 'dry run' mode for safe synchronization.

Get Interactive User Input with Validation

Learn to prompt users for input in Bash scripts, including basic validation for non-empty strings or numeric values, making your scripts more interactive.

Search and Filter File Content with grep and awk

Discover how to efficiently search for patterns within file content using `grep` and perform more advanced text processing, filtering, and data extraction with `awk` in Bash.

Create and Manage Temporary Files and Directories

Learn how to safely create unique temporary files and directories using `mktemp` in Bash scripts, ensuring isolation and preventing naming conflicts for transient data storage.

Run Commands in Parallel and Wait

Optimize Bash script execution by running multiple independent commands concurrently in the background using `&`, then wait for all of them to complete using the `wait` command.

Check and Create Directory or File if Not Exists

Bash script to safely check if a directory or file exists and create it if it doesn't, preventing common script errors in automation workflows.

Parse JSON with jq for API Response Extraction

Efficiently extract specific values from JSON data returned by API calls using the powerful 'jq' command-line JSON processor in Bash scripts.

Execute Remote Commands via SSH in Bash

Automate tasks on remote servers by securely executing commands over SSH directly from your Bash scripts, perfect for web server management and deployment.

Implement Robust Script Cleanup with Trap

Ensure Bash scripts clean up temporary files or stop background processes automatically upon exit or interruption using the 'trap' command for reliability.

Automate Website Deployment with Rsync

Streamline web deployments by synchronizing local changes to a remote server efficiently using rsync, ensuring only modified files are transferred, saving time and bandwidth.

Monitor and Restart a Web Service

Create a bash script to periodically check if a critical web service (e.g., Nginx, Apache) is running and automatically restart it if it's down, ensuring continuous uptime.

Filter and Analyze Web Server Access Logs

Quickly filter and analyze web server access logs (e.g., Apache, Nginx) for specific patterns like error codes, IPs, or URLs using `grep`, `awk`, and `sort` for rapid debugging.