What Is The Best Free Linux OBD2 Software For Live Data?

Free Linux Obd2 Software For Live Data is available, allowing you to read and clear car error codes efficiently. OBD2-SCANNER.EDU.VN offers comprehensive resources for using OBD2 scanners and understanding live data, providing solutions for car diagnostics and maintenance. Explore open-source scan tools and vehicle diagnostic software for Linux to enhance your car’s performance and resolve issues effectively.

1. Understanding OBD2 and Its Importance

1.1 What is OBD2?

OBD2, or On-Board Diagnostics version 2, is a standardized system used in vehicles to monitor and control engine performance and emissions. According to the Environmental Protection Agency (EPA), OBD2 was mandated in the United States for all cars manufactured after 1996 to ensure compliance with emission standards. It provides access to a wealth of data about your vehicle’s health, allowing you to diagnose problems and maintain optimal performance.

1.2 Why is OBD2 Important for Car Owners?

OBD2 is crucial for car owners because it enables early detection of potential issues, reducing the risk of costly repairs. According to a study by the National Institute for Automotive Service Excellence (ASE), vehicles with well-maintained OBD2 systems have fewer emissions-related problems. By monitoring live data, you can identify irregularities in engine performance, fuel efficiency, and emissions, helping you address problems before they escalate. This proactive approach not only saves money on repairs but also ensures your vehicle operates efficiently and complies with environmental regulations.

1.3 Evolution of OBD Systems: From OBD1 to OBD2

The evolution from OBD1 to OBD2 marked a significant advancement in vehicle diagnostics. OBD1 systems, used before 1996, were manufacturer-specific, lacking standardization and making it difficult to interpret diagnostic data across different car brands. In contrast, OBD2 introduced a universal connector and a standardized set of diagnostic trouble codes (DTCs), enabling any mechanic or car owner with an OBD2 scanner to access and interpret vehicle data consistently. This standardization simplified diagnostics and empowered car owners to take control of their vehicle maintenance.

1.4 Key Components of an OBD2 System

An OBD2 system consists of several key components, including:

• OBD2 Connector: A standardized 16-pin port located in the vehicle, typically under the dashboard, allowing access to the car’s diagnostic data.

• Sensors: Various sensors throughout the vehicle monitor parameters such as engine temperature, oxygen levels, and fuel pressure.

• Engine Control Unit (ECU): The ECU is the car’s central computer, processing data from the sensors and controlling various engine functions.

• Diagnostic Trouble Codes (DTCs): Standardized codes that indicate specific issues detected by the OBD2 system.

• OBD2 Scanner: A device used to read DTCs and access live data from the vehicle’s ECU.

1.5 Benefits of Using OBD2 for Vehicle Diagnostics

Using OBD2 for vehicle diagnostics offers numerous benefits:

• Early Problem Detection: Identifies potential issues before they become major problems, saving on costly repairs.
• Improved Fuel Efficiency: Monitors engine performance to ensure optimal fuel consumption.
• Reduced Emissions: Ensures compliance with environmental regulations by monitoring emissions levels.
• Informed Maintenance: Provides data for proactive maintenance, extending the life of your vehicle.
• Cost Savings: Reduces the need for frequent mechanic visits by allowing you to diagnose and address issues yourself.

2. Introduction to Free Linux OBD2 Software

2.1 Overview of Linux as an Operating System for OBD2 Tools

Linux is a powerful and versatile open-source operating system that offers a stable and customizable platform for OBD2 tools. Its open-source nature allows developers to create and modify software to suit specific needs, making it an ideal choice for vehicle diagnostics. According to a study by the Linux Foundation, Linux-based systems are known for their reliability and security, making them suitable for critical applications such as car diagnostics. The flexibility and control offered by Linux enable users to tailor their OBD2 tools for optimal performance and functionality.

2.2 Advantages of Using Free and Open-Source Software

Using free and open-source software (FOSS) for OBD2 diagnostics provides several advantages:

• Cost-Effective: FOSS eliminates the need for expensive proprietary software licenses, reducing costs.
• Customizable: Open-source code can be modified to suit specific vehicle models and diagnostic needs.
• Community Support: A large community of developers and users provides support, updates, and troubleshooting assistance.
• Transparency: Open-source code allows users to inspect and verify the software’s functionality and security.
• No Vendor Lock-In: FOSS avoids dependence on a single vendor, providing greater flexibility and control.

2.3 Key Features to Look for in Free Linux OBD2 Software

When choosing free Linux OBD2 software, consider the following key features:

• Live Data Monitoring: Ability to display real-time sensor data, such as engine temperature, RPM, and fuel pressure.
• Diagnostic Trouble Code (DTC) Reading and Clearing: Capability to read and clear DTCs to identify and resolve issues.
• Support for OBD2 Protocols: Compatibility with various OBD2 protocols, including CAN, ISO, and PWM.
• User-Friendly Interface: An intuitive and easy-to-navigate interface for efficient diagnostics.
• Data Logging: Ability to record and analyze diagnostic data over time.
• Reporting: Generation of diagnostic reports for documentation and analysis.

2.4 Popular Free Linux OBD2 Software Options

Several free Linux OBD2 software options are available, each with its own strengths and features. Here are a few popular choices:

• Scantool: A simple and effective tool for reading and clearing DTCs and monitoring live data.
• PyOBD: A Python-based OBD2 tool that supports multiple OBD2 adapters and protocols.
• OBD-II Scan Master: A comprehensive diagnostic tool with advanced features such as data logging and graphing.
• Freediag: An open-source OBD2 scanner designed for Linux systems, supporting various OBD2 protocols.
• KOBD: A KDE-based OBD2 application with a user-friendly interface and support for multiple languages.

2.5 How to Install and Configure OBD2 Software on Linux

Installing and configuring OBD2 software on Linux typically involves the following steps:

1. Download the Software: Download the desired OBD2 software package from its official website or repository.
2. Install Dependencies: Install any required dependencies, such as Python libraries or development tools.
3. Extract the Package: Extract the downloaded package to a directory on your Linux system.
4. Compile the Code: If necessary, compile the source code using a C++ compiler such as GCC.
5. Configure the Software: Configure the software to recognize your OBD2 adapter by specifying the correct serial port or USB device.
6. Test the Connection: Test the connection to your vehicle’s OBD2 port to ensure the software is functioning correctly.

3. Setting Up Your Linux Environment for OBD2 Diagnostics

3.1 Choosing the Right Linux Distribution

Selecting the right Linux distribution is crucial for setting up your environment for OBD2 diagnostics. Ubuntu is a popular choice due to its ease of use and extensive community support. According to a survey by DistroWatch, Ubuntu is one of the most widely used Linux distributions, making it easy to find resources and assistance. Other suitable distributions include Debian, Fedora, and Linux Mint, each offering a stable and customizable platform for OBD2 diagnostics.

3.2 Installing Necessary Drivers and Libraries

To ensure your OBD2 adapter works correctly with your Linux system, you need to install the necessary drivers and libraries. Most OBD2 adapters use a USB or Bluetooth connection, requiring drivers such as cdc-acm or bluetoothctl. Additionally, you may need to install libraries such as libusb or libbluetooth to enable communication between the software and the adapter. Check the documentation for your specific OBD2 adapter to determine the required drivers and libraries.

3.3 Configuring Serial Port Access for OBD2 Adapters

Configuring serial port access is essential for allowing your OBD2 software to communicate with the adapter. By default, serial ports are often restricted to root users, requiring you to grant access to your user account. You can do this by adding your user to the dialout group, which has permissions to access serial devices. Use the following command to add your user to the dialout group:

sudo usermod -a -G dialout yourusername

After running this command, log out and back in for the changes to take effect.

3.4 Testing the Connection to Your OBD2 Adapter

Before running your OBD2 software, test the connection to ensure the adapter is properly recognized by your Linux system. You can use the dmesg command to check for the adapter’s presence when it is connected. Look for messages indicating the device has been detected and assigned a serial port, such as /dev/ttyUSB0 or /dev/ttyACM0. Once you’ve identified the serial port, you can configure your OBD2 software to use it for communication.

3.5 Troubleshooting Common Linux OBD2 Setup Issues

Setting up OBD2 diagnostics on Linux can sometimes present challenges. Here are some common issues and their solutions:

• Adapter Not Recognized: Ensure the necessary drivers are installed and the adapter is properly connected.
• Permission Denied: Add your user to the dialout group to grant access to the serial port.
• Communication Errors: Verify the correct serial port is selected in the software settings and the adapter is functioning correctly.
• Software Crashes: Check for software updates or try a different OBD2 software option.
• Kernel Issues: Ensure your Linux kernel is up to date and supports the necessary drivers and protocols.

4. Using Free Linux OBD2 Software for Live Data Monitoring

4.1 Connecting to Your Vehicle’s OBD2 Port

Connecting to your vehicle’s OBD2 port is the first step in monitoring live data. Locate the OBD2 port, typically found under the dashboard on the driver’s side. Plug your OBD2 adapter into the port, ensuring it is securely connected. Turn on the vehicle’s ignition without starting the engine to power the OBD2 system. Your OBD2 adapter should now be ready to communicate with your Linux system.

4.2 Reading Real-Time Sensor Data

Once connected, your OBD2 software can read real-time sensor data from your vehicle’s ECU. This data includes parameters such as engine temperature, RPM, vehicle speed, and fuel pressure. Monitor these values to gain insights into your vehicle’s performance and identify any irregularities. Real-time data is invaluable for diagnosing issues and optimizing engine performance.

4.3 Interpreting Live Data Parameters

Interpreting live data parameters requires understanding the typical ranges for each sensor. For example, normal engine temperature is usually between 195°F and 220°F (90°C and 104°C). Deviations from these ranges can indicate problems, such as a malfunctioning thermostat or coolant leak. Similarly, monitoring fuel trim values can help diagnose fuel system issues, while observing oxygen sensor readings can indicate problems with the catalytic converter.

4.4 Common Sensors and Their Significance

Understanding common sensors and their significance is crucial for effective live data monitoring:

• Engine Coolant Temperature (ECT) Sensor: Monitors engine temperature to ensure proper cooling.
• Mass Air Flow (MAF) Sensor: Measures the amount of air entering the engine, helping to calculate the correct fuel mixture.
• Oxygen (O2) Sensors: Measure the oxygen content in the exhaust gas, providing feedback for fuel control.
• Throttle Position Sensor (TPS): Monitors the position of the throttle plate, indicating driver demand.
• Vehicle Speed Sensor (VSS): Measures the vehicle’s speed, used for various control functions.

4.5 Recording and Analyzing Data Logs

Recording and analyzing data logs allows you to track your vehicle’s performance over time. Most OBD2 software offers data logging capabilities, allowing you to record sensor data and save it to a file. You can then analyze the data using spreadsheet software or dedicated data analysis tools to identify trends and anomalies. Data logging is particularly useful for diagnosing intermittent problems or optimizing engine performance.

5. Advanced Features and Functions of Linux OBD2 Software

5.1 Diagnostic Trouble Code (DTC) Reading and Clearing

Reading and clearing DTCs is a fundamental function of OBD2 software. When your vehicle’s ECU detects an issue, it stores a DTC in its memory. OBD2 software allows you to read these codes to identify the problem and take corrective action. Once the issue has been resolved, you can clear the DTC to reset the check engine light. However, it’s essential to understand the cause of the DTC before clearing it to prevent the issue from recurring.

5.2 Freeze Frame Data Analysis

Freeze frame data captures a snapshot of sensor values at the moment a DTC is set. This data can provide valuable clues about the conditions that triggered the issue. Analyzing freeze frame data can help you narrow down the possible causes of the DTC and diagnose the problem more effectively. For example, freeze frame data may reveal that a misfire occurred under high load conditions, indicating a problem with the ignition system or fuel delivery.

5.3 On-Board Monitoring Tests

On-board monitoring tests are diagnostic routines performed by the vehicle’s ECU to monitor the performance of various systems. These tests can provide more detailed information about specific components, such as the oxygen sensors or catalytic converter. OBD2 software allows you to access the results of these tests, providing insights into the health of your vehicle’s emission control systems.

5.4 Vehicle Information (VIN) Retrieval

Vehicle Information (VIN) retrieval allows you to obtain information about your vehicle, such as its make, model, and year of manufacture. This information is useful for ensuring compatibility with OBD2 software and accessing vehicle-specific diagnostic data. Most OBD2 software can automatically retrieve the VIN from your vehicle’s ECU, simplifying the diagnostic process.

5.5 Customizing Software Settings and Preferences

Customizing software settings and preferences allows you to tailor the OBD2 software to your specific needs. You can configure settings such as the communication protocol, serial port, and data display options. Customization can improve the software’s performance and usability, making it easier to diagnose and maintain your vehicle.

6. Troubleshooting Common OBD2 Issues with Linux Software

6.1 Interpreting Diagnostic Trouble Codes (DTCs)

Interpreting DTCs is crucial for diagnosing vehicle problems. DTCs are standardized codes that indicate specific issues detected by the OBD2 system. Each DTC consists of a letter followed by four numbers, representing the system, code type, and specific problem. For example, P0300 indicates a random or multiple cylinder misfire. Understanding the meaning of DTCs is essential for effective troubleshooting.

6.2 Addressing Communication Errors

Communication errors can occur when the OBD2 software cannot communicate with the vehicle’s ECU. These errors can be caused by various factors, such as a faulty OBD2 adapter, incorrect serial port settings, or a problem with the vehicle’s wiring. To address communication errors, check the connection to the OBD2 port, verify the correct serial port is selected in the software settings, and ensure the OBD2 adapter is functioning correctly.

6.3 Dealing with Inaccurate Sensor Readings

Inaccurate sensor readings can lead to misdiagnosis and ineffective repairs. If you suspect a sensor reading is inaccurate, compare it to the expected range for that sensor and check for any obvious signs of damage or contamination. You can also use a multimeter to test the sensor’s output voltage or resistance. If the sensor is faulty, replace it with a new one to restore accurate readings.

6.4 Resolving Software Compatibility Issues

Software compatibility issues can prevent the OBD2 software from functioning correctly. Ensure the software is compatible with your Linux distribution and OBD2 adapter. Check for software updates or try a different OBD2 software option. You may also need to install additional libraries or dependencies to resolve compatibility issues.

6.5 Avoiding Common Mistakes During OBD2 Diagnostics

Avoiding common mistakes during OBD2 diagnostics is essential for accurate troubleshooting. Here are a few common mistakes to avoid:

• Clearing DTCs Without Understanding the Cause: Always understand the cause of a DTC before clearing it to prevent the issue from recurring.
• Ignoring Freeze Frame Data: Freeze frame data can provide valuable clues about the conditions that triggered the DTC.
• Relying Solely on DTCs: DTCs are just a starting point. Use live data and on-board monitoring tests to gather additional information.
• Neglecting Basic Maintenance: Ensure your vehicle is properly maintained to prevent common issues from occurring.
• Assuming the Worst: Start with the simplest and most likely causes before assuming a major problem.

7. Advanced Techniques for Live Data Analysis

7.1 Using Graphs and Charts to Visualize Data

Using graphs and charts to visualize data can help you identify trends and anomalies more easily. Most OBD2 software offers graphing capabilities, allowing you to plot sensor data over time. Visualizing data can reveal patterns that may not be apparent when looking at raw numbers. For example, graphing engine temperature over time can reveal a gradual overheating issue that may not be obvious from a single reading.

7.2 Creating Custom Dashboards for Monitoring Specific Parameters

Creating custom dashboards allows you to monitor specific parameters that are relevant to your diagnostic needs. You can configure your dashboard to display the most important sensor values, such as engine temperature, RPM, and fuel trim. Custom dashboards can streamline the diagnostic process by providing a focused view of the data.

7.3 Comparing Data from Multiple Sensors

Comparing data from multiple sensors can reveal relationships and dependencies that can aid in diagnosis. For example, comparing the readings from the MAF sensor and oxygen sensors can help diagnose fuel system issues. Similarly, comparing the readings from the throttle position sensor and engine RPM can help diagnose transmission problems.

7.4 Identifying Intermittent Problems with Data Logging

Identifying intermittent problems can be challenging, but data logging can help. By recording sensor data over time, you can capture the conditions that trigger the intermittent issue. Analyze the data logs to identify patterns and anomalies that may provide clues about the cause of the problem. Data logging is particularly useful for diagnosing issues that occur only under specific driving conditions.

7.5 Using Data Analysis Tools for In-Depth Diagnostics

Using data analysis tools can provide more in-depth diagnostics. Spreadsheet software, such as Microsoft Excel or Google Sheets, can be used to analyze data logs and perform calculations. Dedicated data analysis tools, such as MATLAB or Python, offer more advanced capabilities, such as signal processing and statistical analysis. These tools can help you extract valuable insights from your OBD2 data.

8. Maintaining and Updating Your Linux OBD2 Software

8.1 Checking for Software Updates and Patches

Checking for software updates and patches is essential for ensuring your OBD2 software is functioning correctly. Updates often include bug fixes, performance improvements, and new features. Regularly check the software’s website or repository for updates and install them promptly.

8.2 Backing Up Your Software Configuration and Data

Backing up your software configuration and data is crucial for preventing data loss. Create backups of your software settings, data logs, and custom dashboards. Store the backups in a safe location, such as an external hard drive or cloud storage. In the event of a software failure or system crash, you can restore your backups to quickly recover your data and configuration.

8.3 Keeping Your Linux System Secure and Stable

Keeping your Linux system secure and stable is essential for reliable OBD2 diagnostics. Install security updates and patches regularly to protect against malware and vulnerabilities. Use a firewall to prevent unauthorized access to your system. Monitor system performance to identify and address any issues that may affect stability.

8.4 Optimizing Your Linux System for OBD2 Performance

Optimizing your Linux system can improve the performance of your OBD2 software. Close unnecessary applications and processes to free up system resources. Use a lightweight desktop environment to reduce resource consumption. Configure your system to prioritize OBD2 software processes to ensure they receive adequate resources.

8.5 Contributing to the Open-Source Community

Contributing to the open-source community can help improve the quality and availability of free Linux OBD2 software. Report bugs, suggest new features, and contribute code to help developers improve the software. By contributing to the community, you can help ensure that free Linux OBD2 software remains a valuable resource for car owners and mechanics.

9. Case Studies: Real-World Applications of Free Linux OBD2 Software

9.1 Diagnosing Engine Misfires with Live Data

Engine misfires can be diagnosed using live data from OBD2 software. Monitor the RPM and misfire counters for each cylinder to identify the cylinder that is misfiring. Compare the readings from the fuel injectors and ignition coils for the misfiring cylinder to those of the other cylinders. This can help you identify the cause of the misfire, such as a faulty fuel injector or ignition coil.

9.2 Identifying Fuel System Problems with Oxygen Sensor Readings

Fuel system problems can be identified using oxygen sensor readings. Monitor the oxygen sensor voltages to determine if the fuel mixture is too rich or too lean. Compare the readings from the upstream and downstream oxygen sensors to assess the performance of the catalytic converter. This can help you diagnose fuel system problems, such as a faulty fuel pump or fuel pressure regulator.

9.3 Monitoring Transmission Performance with Sensor Data

Transmission performance can be monitored using sensor data from OBD2 software. Monitor the transmission temperature, gear selection, and torque converter slip to assess the health of the transmission. Compare the readings from the input and output speed sensors to detect any slippage or irregularities. This can help you diagnose transmission problems, such as a faulty solenoid or torque converter.

9.4 Optimizing Fuel Efficiency with Real-Time Monitoring

Fuel efficiency can be optimized using real-time monitoring of OBD2 data. Monitor the fuel consumption, engine load, and vehicle speed to identify driving habits that are affecting fuel efficiency. Adjust your driving style to minimize fuel consumption, such as avoiding hard acceleration and maintaining a steady speed.

9.5 Diagnosing Emission Control System Issues

Emission control system issues can be diagnosed using OBD2 software. Monitor the oxygen sensor readings, catalytic converter temperature, and EGR valve position to assess the performance of the emission control system. Compare the readings to the expected ranges to identify any problems. This can help you diagnose emission control system issues, such as a faulty oxygen sensor or catalytic converter.

10. Future Trends in OBD2 Technology and Linux Software

10.1 Integration with IoT and Cloud-Based Services

Integration with IoT (Internet of Things) and cloud-based services is a growing trend in OBD2 technology. This integration allows you to access and analyze your vehicle’s data remotely, using a smartphone or computer. Cloud-based services can provide additional features, such as predictive maintenance and remote diagnostics.

10.2 Advancements in Wireless OBD2 Adapters

Advancements in wireless OBD2 adapters are making it easier to connect to your vehicle’s OBD2 port. Bluetooth and Wi-Fi adapters eliminate the need for cables, providing greater convenience and flexibility. Wireless adapters also allow you to use your smartphone or tablet as a diagnostic tool.

10.3 Machine Learning and AI in Vehicle Diagnostics

Machine learning and AI (Artificial Intelligence) are being used to improve the accuracy and efficiency of vehicle diagnostics. AI algorithms can analyze large amounts of OBD2 data to identify patterns and anomalies that may indicate potential problems. Machine learning can also be used to predict when maintenance is needed, helping to prevent breakdowns.

10.4 Enhanced Data Security and Privacy Measures

Enhanced data security and privacy measures are becoming increasingly important as OBD2 technology becomes more connected. Protecting your vehicle’s data from unauthorized access is essential. Encryption and authentication protocols are being used to secure OBD2 data transmissions.

10.5 The Role of Open-Source Communities in OBD2 Development

The role of open-source communities in OBD2 development is becoming more significant. Open-source communities provide a collaborative environment for developers to create and improve OBD2 software. This can lead to more innovative and reliable solutions for vehicle diagnostics.

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FAQ: Frequently Asked Questions About Free Linux OBD2 Software for Live Data

What is an OBD2 scanner?

An OBD2 scanner is a device used to access and interpret data from a vehicle’s On-Board Diagnostics (OBD) system, which monitors engine performance and emissions. According to the EPA, OBD2 systems have been standardized since 1996, making it easier to diagnose car problems. These scanners read Diagnostic Trouble Codes (DTCs) and display live data, helping car owners and mechanics identify issues quickly.

How do I read OBD2 error codes?

To read OBD2 error codes, connect an OBD2 scanner to your vehicle’s OBD2 port, turn on the ignition, and use the scanner’s interface to read the stored DTCs. The scanner will display the codes along with brief descriptions. For example, a P0300 code indicates a random or multiple cylinder misfire. Refer to an OBD2 code database for detailed explanations and troubleshooting steps.

What are the common car issues and how can OBD2 help?

Common car issues include engine misfires, oxygen sensor failures, catalytic converter problems, and transmission issues. OBD2 scanners can help diagnose these problems by providing specific DTCs and live data. For instance, monitoring oxygen sensor readings can help identify a faulty sensor, while live data on engine temperature can indicate a cooling system issue.

Is it safe to clear OBD2 error codes myself?

It is generally safe to clear OBD2 error codes yourself, but only after you have identified and resolved the underlying issue. Clearing codes without fixing the problem will only temporarily turn off the check engine light, and the code will likely return. Always diagnose and repair the issue before clearing the code to ensure the problem is resolved.

Can I use free OBD2 software on Linux?

Yes, you can use free OBD2 software on Linux. Several open-source options are available, such as Scantool, PyOBD, and Freediag, which offer features like reading DTCs, monitoring live data, and performing diagnostic tests. These tools provide cost-effective solutions for car diagnostics on Linux systems.

What Linux distribution is best for OBD2 software?

Ubuntu is often recommended as the best Linux distribution for OBD2 software due to its ease of use, extensive community support, and compatibility with various OBD2 adapters and software. Other suitable distributions include Debian, Fedora, and Linux Mint.

Do I need special drivers for my OBD2 adapter on Linux?

Yes, you may need special drivers for your OBD2 adapter on Linux. Most OBD2 adapters use a USB or Bluetooth connection, requiring drivers such as cdc-acm or bluetoothctl. Check the documentation for your specific OBD2 adapter to determine the required drivers and libraries.

How do I configure serial port access for my OBD2 adapter on Linux?

To configure serial port access for your OBD2 adapter on Linux, add your user to the dialout group, which has permissions to access serial devices. Use the command sudo usermod -a -G dialout yourusername and then log out and back in for the changes to take effect.

What kind of live data can I monitor with OBD2 software?

With OBD2 software, you can monitor various types of live data, including engine temperature, RPM, vehicle speed, fuel pressure, oxygen sensor readings, and throttle position. These parameters provide valuable insights into your vehicle’s performance and can help diagnose issues in real-time.

What are the benefits of using OBD2 for vehicle diagnostics?

The benefits of using OBD2 for vehicle diagnostics include early problem detection, improved fuel efficiency, reduced emissions, informed maintenance, and cost savings. OBD2 systems enable car owners and mechanics to identify potential issues before they become major problems, saving time and money on repairs.