Ubuntu Troubleshooting Guide

When performing system diagnostics and troubleshooting in Ubuntu, it is often necessary to use command line tools and log files to help identify issues. Here are some common methods:

1. Utilize system monitoring tools: Ubuntu offers various system monitoring tools such as top and htop, which allow you to check the system’s resource usage, as well as view running processes and services.
2. To view system logs: The system log files in Ubuntu are typically stored in the /var/log directory, and can be viewed using commands such as cat, less, etc., in order to understand any errors or warnings that may occur during system operation.
3. Utilize system diagnostic tools: Ubuntu also offers various system diagnostic tools like dmesg, lshw, lspci, etc., which can be used to view hardware information, device drivers, etc.
4. Check the network connection: If you encounter any network issues, you can use commands such as ping, traceroute, etc. to verify if the network connection is functioning properly.
5. Check the hardware: If there are suspicions of hardware failure, you can use hardware diagnostic tools like memtest86+ to test the memory and smartmontools to check the health of the hard drive.

In general, system diagnosis and troubleshooting operations require careful observation of system operation status and log information, systematically identifying possible issues, and taking appropriate measures to resolve them.