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Most used bash Scripts

 

1. Backup Scripts

  • Automated Backup: Backs up files or directories to a specified location (local or remote) and often runs on a schedule via cron.
  • Database Backup: Dumps a database (e.g., MySQL, PostgreSQL) and stores the backup in a secure location.

2. System Monitoring Scripts

  • Disk Usage Monitoring: Checks disk space usage and sends an alert if usage exceeds a threshold.
  • Process Monitoring: Monitors the status of critical processes and restarts them if they are not running.
  • Service Health Check: Regularly checks if services (e.g., web server, database) are running and restarts them if necessary.

3. System Update Scripts

  • Automated Patching: Updates system packages and applies patches on a regular basis.
  • Kernel Upgrade: Automates the process of upgrading the Linux kernel on a server.

4. User and Permission Management

  • User Account Creation: Automates the creation of user accounts with predefined settings (e.g., home directory, shell).
  • Permission Setup: Sets permissions and ownership for directories and files according to a defined policy.

5. Log Rotation and Management

  • Log Rotation: Rotates log files, compresses old logs, and deletes logs older than a certain period.
  • Log Parsing: Searches logs for specific patterns (e.g., errors, access attempts) and generates reports or sends alerts.

6. Automated Deployment

  • Code Deployment: Automates the deployment of code to servers, including pulling from a version control system, stopping/starting services, and applying configuration changes.
  • Container Management: Manages Docker containers, including pulling images, starting/stopping containers, and cleanup.

7. Network Configuration and Management

  • IP Configuration: Configures network interfaces, assigns IP addresses, and updates DNS settings.
  • Firewall Rules: Automates the setup of firewall rules using tools like iptables or ufw.

8. Data Processing and Automation

  • File Manipulation: Processes files (e.g., text processing with sed, awk, grep), renames files in bulk, or converts file formats.
  • CSV/Data Parsing: Parses CSV files, extracts information, and generates reports or summaries.

9. Security and Compliance Scripts

  • User Audits: Checks for unauthorized user accounts or changes to critical files and directories.
  • Password Expiry: Notifies users of impending password expiry and forces password changes when required.

10. Custom Application Management

  • Application Startup/Shutdown: Scripts to start or stop applications or services, especially those that require multiple steps or custom configurations.
  • Health Check: Monitors custom applications for availability and performance issues, restarting or reconfiguring them as needed.

11. Cron Jobs

  • Scheduled Tasks: Automates tasks like backups, updates, or monitoring checks at specific intervals using cron jobs.

12. Environment Setup Scripts

  • Development Environment Setup: Sets up the necessary environment variables, installs required packages, and configures settings for development environments.

13. Cleanup and Maintenance Scripts

  • Temporary File Cleanup: Removes temporary files or caches to free up disk space.
  • Old File Deletion: Automatically deletes files older than a specified number of days from certain directories.

14. Automation of Repetitive Tasks

  • File Transfers: Automates file transfers using scp, rsync, or ftp.
  • Report Generation: Collects data from various sources, processes it, and generates reports.

These scripts help automate and streamline a wide range of tasks, making them invaluable in both small and large-scale IT environments.

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