System Testing tool for Ubuntu
Try
System Testing
System Testing, can test your system and submit results to the Ubuntu Friendly project.
You have to manually participate for the test.
To install, just click System Testing
Can also install with :
sudo apt-get install checkbox-gui
Phoronix Test suite
You can use Phoronix Test suite. It is best testing Utility for Linux Systems.
It is having a Dash icon. But runs in terminal. Takes few hours to run a comprehensive test. Finally gives a report.
Or:
sudo apt install phoronix-test-suite
hw-probe
Try hw-probe tool on your host with a Docker image or
sudo snap install hw-probe
The probe includes outputs of several Linux diagnostics tools (smartctl, memtester, etc.), hardware listers (hwinfo, dmidecode, biosdecode, etc.) and system logs (Xorg.log, dmesg, etc.).
Probe example: https://linux-hardware.org/?probe=0b29192f95
I'm the author of this project, so feel free to ask any questions in comments!