I deleted the docker image and recreated according to information I found on the forum. Process worked fine.
I observed very strange behavior a day later. I could not reach the server anymore via my VPN. I first thought maybe the VPN died. But when I came to the physical location of the server today, the server did not respond either. Pinging worked, but that only shows the network interface still works. I suspect that the whole OS must have crashed. What could have caused something like this? After a restart by physically using the power button on the machine it rebooted and seems to work again for now.
I tried to run memtest but the system always just reboots to the mode selection screen when I select memtest86 and press enter. Strange. Am I maybe missing something here?
16GiB of RAM are detected by the OS and displayed in the WebUI, which is the correct amount.
It seems to me there is more wrong with the system than I previously suspected. Upon boot I saw on the connected monitor of the server that it said "There are differences between boot sector and its backup". What does this mean exactly?
Another forum post described this event as well:
But I am not sure if I should try to use this solution or if this is not well suited in my case.
Also I just saw this error in the log. I can explain why I would get a segmentation fault.
Jun 24 10:24:09 ryan kernel: php-fpm[22222]: segfault at 1568a92870a0 ip 00000000008dcd1b sp 00007fff6de4cf10 error 6 in php-fpm[600000+3c0000] likely on CPU 6 (core 2, socket 0)
I would much appreciate any further guidance on this topic. Thank you for your support thus far.