Explanation of Enhancements
User-Friendliness:
Added -h flag with usage instructions.
Verbose mode (-v) for detailed output.
Clearer reboot prompt with a 10-second timeout defaulting to "yes".
Error Handling:
Checks for root privileges.
Validates file writability and command success with exit codes.
Creates backups of modified files with timestamps.
Enterprise Features:
Logging to /var/log/iommu_setup.log for auditing.
Dry-run mode (-d) to test without changes.
Configurable via command-line flags.
Robustness:
Case-insensitive CPU detection with grep -i.
Structured error messages and graceful exits.
Backup mechanism to rollback manually if needed.
Security:
Explicit root check to prevent unauthorized runs. File backups reduce risk of irreversible changes.