check_os_eol

check_os_eol is a Bash script designed to check the End Of Life (EOL) status of various Linux distributions. It reads the OS version from /etc/os-release, compares it with a predefined list of EOL dates, and alerts if the OS is approaching or has surpassed its EOL date.

Features

• Supports multiple major Linux distributions including Ubuntu, Debian, CentOS, RHEL, Fedora, Rocky Linux, AlmaLinux, SUSE, and openSUSE.
• Configurable warning and critical thresholds.
• Provides human-readable output indicating the EOL status.

Usage

./check_os_eol.sh [WARN_DAYS] [CRIT_DAYS]

• WARN_DAYS: Number of days before EOL to issue a warning (default: 90 days).
• CRIT_DAYS: Number of days before EOL to issue a critical alert (default: 30 days).
• -h: Display help message.

Examples

Check with default thresholds (90 days for warning, 30 days for critical):

./check_os_eol.sh

Check with custom thresholds (e.g., 60 days for warning, 20 days for critical):

./check_os_eol.sh 60 20

Help

To display the help message:

./check_os_eol.sh -h

Output

The script provides output in the following formats:

• OK: The OS will not reach EOL soon.
• WARNING: The OS will reach EOL within the specified warning period.
• CRITICAL: The OS will reach EOL within the specified critical period or is already EOL.
• UNKNOWN: The OS or its EOL date could not be determined.

Supported Distributions

• Ubuntu
  • 18.04 (EOL: 2023-04-30)
  • 20.04 (EOL: 2025-04-30)
  • 22.04 (EOL: 2027-04-30)
  • 24.04 (EOL: 2029-04-30)
• Debian
  • 10 (EOL: 2024-06-30)
  • 11 (EOL: 2026-06-30)
  • 12 (EOL: 2028-06-30)
• CentOS
  • 7 (EOL: 2024-06-30)
  • 8 (EOL: 2021-12-31)
• RHEL
  • 7 (EOL: 2024-06-30)
  • 8 (EOL: 2029-05-31)
  • 9 (EOL: 2032-05-31)
• Fedora
  • 37 (EOL: 2024-12-31)
  • 38 (EOL: 2025-06-30)
• Rocky Linux
  • 8 (EOL: 2029-05-31)
  • 9 (EOL: 2032-05-31)
• AlmaLinux
  • 8 (EOL: 2029-05-31)
  • 9 (EOL: 2032-05-31)
• SUSE
  • SLES 12 (EOL: 2027-10-31)
  • SLES 15 (EOL: 2031-07-31)
  • openSUSE Leap 15.5 (EOL: 2024-12-31)

Installation

1. Clone the repository:

   git clone https://github.com/pr0j3ctx/check_os_eol.git

2. Change into the directory:

   cd check_os_eol

3. Make the script executable:

   chmod +x check_os_eol

Contributing

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

License

This project is licensed under the GNU General Public License v3.0 - see the LICENSE file for details.

Changelog

[Unreleased]

• Initial release of check_os_eol.

[1.0.0] - 2024-07-08

• Added support for Ubuntu, Debian, CentOS, RHEL, Fedora, Rocky Linux, AlmaLinux, SUSE, and openSUSE.
• Configurable warning and critical thresholds.
• Added human-readable output indicating the EOL status.