Test your PC hardware in GNU/Linux

1. Check the system's specifications: Use the lshw command to get detailed information about the system's hardware components, such as the processor, memory, storage devices, and network interfaces.

2. Test the processor: Use the lscpu command to check the processor's specifications, such as the number of cores, clock speed, and architecture.

3. Test the memory: Use the free command to check the amount of free and used memory on the system. You can also use the memtest86+ tool to perform a more thorough test of the system's memory.

4. Test the storage devices: Use the lsblk command to check the storage devices connected to the system, including their size and file system type. You can also use the smartctl tool to check the health of the storage device.

5. Test the network interfaces: Use the ifconfig or ip addr command to check the network interfaces on the system. You can also use the ping command to check if the system can communicate with other devices on the network.

6. Test the GPU: Use the lspci | grep VGA to check the Graphics card.

7. Check the temperature: Use the sensors command to check the temperature of different hardware components

8. Check the power supply: Use the upower -i /org/freedesktop/UPower/devices/battery_BAT0 to check the current status of the battery, if the PC is a laptop, otherwise check the power supply using a multimeter.