# System Maintenance

> ⚠️ This documentation is AI-generated and may contain errors.

Example system maintenance script demonstrating permission checks, environment variables, and log rotation.

## Script

See the full script in `/examples/system_maintenance.rsh` in the repository.

```rush
#!/usr/bin/env rush

HOSTNAME = "prod-server-01"
MAX_DISK_USAGE = "85"
LOG_DIR = "/var/log"
BACKUP_DIR = "$HOME/backups"

echo "System Maintenance Script"
echo "Running on: $HOSTNAME"
echo "User: $USER"

# Permission-aware execution
if $IS_ROOT {
    echo "Running with root privileges"
    
    for check in disk memory services {
        echo "Checking $check status..."
        if $check {
            echo "  ✓ $check is healthy"
        }
    }
} else {
    echo "Running as $USER (limited permissions)"
    echo "Some checks may be skipped"
}

# Log rotation planning
echo "Preparing log rotation in $LOG_DIR"

for days in 1 7 30 {
    LOG_ARCHIVE = "$BACKUP_DIR/logs-$days-days-old.tar.gz"
    echo "Would archive logs older than $days days to $LOG_ARCHIVE"
}
```

## Key Concepts

- **Permission-aware execution**: Different behavior for root vs normal user
- **String interpolation**: Building paths with `$HOME`, `$USER`
- **Loops for maintenance tasks**: Iterating over checks and retention periods