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The "diag" Command

The diag command in ChromeOS provides access to system diagnostics tools and routines. This section explains how to use this diagnostic utility effectively.

Command Overview

The basic syntax for the command is:

diag [list|routine]

The command provides two main operations: - Listing available diagnostic tests - Running diagnostic routines

Understanding Diagnostics

Purpose

The diag command helps users: - Identify system issues - Run diagnostic tests - Verify system health - Troubleshoot problems

Basic Operations

The command supports two main functions: 1. List Function - Shows available diagnostics - Displays test categories - Lists routine options - Provides test descriptions

  1. Routine Function
  2. Executes diagnostic tests
  3. Runs system checks
  4. Performs health verification
  5. Generates diagnostic reports

Using the Command

Listing Available Tests

  1. View available diagnostics: 
    diag list

Running Diagnostics

  1. Execute a diagnostic routine: 
    diag routine

Best Practices

Before Running Diagnostics

  1. Preparation
  2. Close unnecessary applications
  3. Save all work
  4. Document current issues

  5. Note system state

  6. Environment

  7. Ensure stable power
  8. Connect to network if needed
  9. Close background processes
  10. Free up system resources

During Diagnostics

  1. Monitoring
  2. Watch for errors
  3. Note test progress
  4. Document results

  5. Track completion status

  6. Documentation

  7. Record test results
  8. Note any errors
  9. Document system behavior
  10. Save diagnostic outputs

Common Use Cases

System Troubleshooting

  1. Problem Diagnosis
  2. Hardware issues
  3. System performance
  4. Component testing

  5. Health verification

  6. Maintenance

  7. Regular health checks
  8. System verification
  9. Performance monitoring
  10. Component testing

Safety Considerations

System Impact

  1. Resource Usage
  2. CPU utilization
  3. Memory consumption
  4. Storage access

  5. Network usage

  6. System State

  7. Running processes
  8. Active applications
  9. System stability
  10. Resource availability

Troubleshooting

Common Issues

  1. Test Failures
  2. Error messages
  3. Failed diagnostics
  4. Incomplete tests

  5. System limitations

  6. Resolution Steps

  7. Review error logs
  8. Check system resources
  9. Verify requirements
  10. Retry failed tests \