SSL Certificate Checker

This Bash script checks the SSL certificates of specified websites and logs information about the certificates. It sends notifications if the certificates are invalid or close to expiration.

Features

• Checks SSL certificates for a list of websites.
• Logs certificate information including issuer and expiration date.
• Sends notifications for invalid certificates or certificates that are close to expiring.

Prerequisites

• openSSL
• Bash

Usage

1. Clone the repository:

git clone https://github.com/yourusername/ssl-certificate-checker.git
cd ssl-certificate-checker

2. Add the websites to be checked:

websites=("https://google.com" "https://youtube.com" "https://facebook.com")

3. Run the script:

./ssl_check.sh

4. View the log file:

Check the ssl_check.log file for detailed logs of the certificate checks.

Script Details

Variables

• websites: An array of websites to check.
• log_file: The file where logs will be written.

Functions

• send_notification(website, message): Sends a notification with a given message for a specified website.
• check_ssl_certificate(website): Checks the SSL certificate for a specified website, logs details, and sends notifications if necessary.

Logging and Notifications

• Logs are written to ssl_check.log.
• Notifications are sent using the send_notification function. Currently, this function prints to the console but can be modified to send emails or alerts.

Example Output

 Thu Jun 23 14:23:45 UTC 2024: SSL certificate for https://google.com issued by C=US, O=Google Trust Services LLC, CN=GTS CA 1C3, expires on Jun 22 14:23:45 2024 GMT (in 29 days)
 Thu Jun 23 14:23:45 UTC 2024: Warning: SSL certificate for https://google.com is expiring in 29 days

Customization

Modify the websites array to include the websites you want to check. Customize the send_notification function to integrate with your preferred notification system (e.g., email, SMS, Slack).

License

This project is licensed under the MIT License.

Contributing

Contributions are welcome! Please open an issue or submit a pull request with your improvements.

Disk Usage Monitoring and Backup Script

This Bash script monitors disk usage for a specified directory and compresses files when usage exceeds a threshold. It also logs messages and alerts.

Features

Monitors disk usage for a designated directory. Compresses files into a tar.gz archive when usage exceeds a configurable threshold. Stores compressed backups in a designated directory. Logs monitoring and compression activities to a file (disk_usage_alert.log). Sends alerts to the console for critical events.

Usage

Edit the script:

• Open the script (disk_usage_monitor.sh) in a text editor.
• Update the following variables according to your needs:
• MONITORED_DIR: The directory to monitor for disk usage (default: /home/pruthvibhat/dummyMonitor).
• BACKUP_DIR: The directory to store compressed backups (default: /home/pruthvibhat/dummyBackup).
• THRESHOLD: The disk usage threshold in percentage (default: 5).
• LOG_FILE: The file to store log messages (default: disk_usage_alert.log).

Make the script executable:

chmod +x disk_usage_monitor.sh

Run the script:

./disk_usage_monitor.sh

Notes

• This script requires Bash to run.
• The script creates the backup directory ($BACKUP_DIR) if it doesn't exist.
• Modify the script for additional features or customization as needed.

Additional Considerations

• Cron Job: Schedule the script to run periodically using a cron job (e.g., hourly, daily) for continuous monitoring.
• Email Alerts: Extend the send_alert function to send email notifications for critical events.
• Error Handling: Consider adding more robust error handling for compression failures.